Sol+Guard round solar pool cover – When solar energy meets science

If you have a round pool (Ø 3.5m, Ø 4.5m, Ø 5.5m). If you want to heat it cost-effectively. If you love warm water – without the electricity bill.

They have a round pool (steel-walled pool, above-ground pool, round in-ground pool). Unheated (no heat pump). The problem:

In the morning: the water is 18°C ​​(cool, uncomfortable). The sun shines during the day → the water warms up to 22°C (comfortable). Overnight: evaporation (water evaporates from the surface → taking heat with it) → the pool loses 3-4°C → back to 18°C ​​in the morning . The cycle begins again.

The result: The pool is only warm in the afternoon (22-24°C, short time window). Too cold in the mornings/evenings. Swimming season shortened (only June-August, 3 months instead of 5 months).

Plus: Evaporation = water loss (5-10 mm daily = 100-200 liters/day for a 4.5 m diameter pool = 3,000-6,000 liters/month to refill). Plus: Water loss = pH value rises (water becomes harder) = more chemicals needed.

There is a solution. One that costs zero electricity.

The Sol+Guard (round) solar pool cover with GeoBubble technology – the scientifically developed pool cover for round pools. Transparent (allows 80% of solar energy to pass through). Two effects simultaneously: (1) heating the water (through solar radiation, like a greenhouse), (2) storing heat (by preventing evaporation overnight).

What you will receive:

• Water temperature +2-8°C (depending on sunlight, location, pool)
• Evaporation reduced by 98% (pool hardly loses any water overnight)
• Swimming season extended (April-October instead of June-August = +3 months)
• GeoBubble technology (patented, 25% longer lifespan than standard solar films)
• Transparent blue-turquoise (allows 80% visible + infrared light to pass through)
• 500 micron material thickness (robust, durable)
• Dirt control (leaves/insects stay out)
• Custom-made round (individually tailored to the diameter of your pool)
• Zero electricity costs (sun = free)

The result: You put a solar cover on the pool in the evening (water is 24°C). Overnight: Evaporation stops (the cover forms a barrier). In the morning: The water is 23°C (instead of 20°C). You swim in the warm pool in the morning – instead of waiting until the afternoon.

May. Water is 18°C ​​(unheated, too cold). With a solar cover: 2 weeks of sun (cover on daily, at night) → water warms up to 24°C. You can swim at the beginning of May – instead of mid-June.

The 5 most important advantages at a glance:

• Water temperature +2-8°C through solar energy : Transparent material allows 80% of solar energy to pass through (visible + infrared spectrum), greenhouse effect (heat comes in, stays in), pool heats up for free by the sun, +2-4°C in cloudy weather, +4-8°C in sunny weather
• Evaporation reduced by 98% = heat stored : The foil forms a barrier between the water and the atmosphere (evaporation stopped), the pool only loses 0.5°C overnight (instead of 3-4°C), saves 3,000-6,000 liters of water per month (for a 4.5m pool), pH value more stable (fewer chemicals needed)
• GeoBubble technology = 25% longer lifespan : Patented bubble shape (scientifically developed, not round like standard films), reduces material stress (fewer cracks, less UV damage), lasts 5-7 years (standard films: 3-5 years), more robust and durable
• Perfect for round pools (steel wall, above-ground pools) : Custom-made round (Ø 3m, Ø 3.5m, Ø 4m, Ø 4.5m, Ø 5m, Ø 5.5m, other diameters), fits perfectly on round pools (no corners, no folds), ideal for steel wall pools, above-ground pools, round in-ground pools
• Dirt control = less cleaning work : leaves/pollen/insects stay out (don't fall into the water), less netting (saves 1-2 hours/week), less algae growth (film is opaque = less sunlight in the water)

Who is this round solar film ideally suited for?

Reality check : The Sol+Guard (round) pool solar cover is for people with round pools (steel wall pools, above-ground pools, round built-in pools) who want to heat their pools for free (without electricity, without gas) – and extend their swimming season .

✓ People with steel wall pools (Ø 3.5m, Ø 4.5m, Ø 5.5m)
Steel-walled pools are usually round (standard diameters: Ø 3.5m, Ø 4.0m, Ø 4.5m, Ø 5.0m, Ø 5.5m). Rectangular solar covers don't fit (too much overhang at the corners, impractical). Round solar covers: Custom-made to the diameter → fits perfectly → no wrinkles, no overhang.

✓ People with above-ground pools (Quick-Up, Frame pools)
Above-ground pools (e.g., Intex, Bestway) are often round (3m, 3.6m, 4.5m diameter). They are usually unheated (no heat pump – that would be too expensive for a temporary pool). Problem: The water is cold (18-20°C, only warm in the height of summer). Solar cover: Heats the pool for free (+4-6°C over 3-4 days) → extends the swimming season.

✓ People with round built-in pools (stainless steel, GRP)
Round in-ground pools (stainless steel or fiberglass) are less common than rectangular ones – but they do exist. Often unheated (a heat pump is too expensive, or the natural look is preferred). Solar cover: A perfect addition (heats the pool for free, extends the season).

✓ People with unheated pools (who don't want to invest in a heat pump)
A heat pump costs €3,000-€6,000 (purchase) + €150-€300/month for electricity (operation). That's expensive – especially for smaller pools (Ø 4.5m, 16 m²). Solar cover: One-time cost of €150-€500 (depending on diameter) + zero operating costs (sunlight is free). Payback: Immediate.

✓ People who want to extend the swimming season (April-October instead of June-August)
Without heating: The pool is only warm from June to August (22-26°C, 3-month swimming season). April/May: too cold (16-20°C). September/October: too cold (18-22°C). With a solar cover: The pool heats up faster in spring (April: 18°C ​​→ 24°C with the solar cover) and stays warm longer in autumn (October: 16°C → 22°C with the solar cover). Swimming season: 7 months instead of 3 months.

✓ People who hate evaporation (water loss + pH problems)
Round pools (Ø 4.5m, 16 m²): Evaporation 5-10mm daily = 80-160 liters/day = 2,400-4,800 liters/month. You have to constantly refill them (garden hose, weekly). Plus: Water evaporates → pH value rises → more pH reducer needed. With a solar cover: Evaporation reduced by 98% → pool only loses 20-50 liters/month → hardly any refilling required → pH value remains stable.

✓ People who want to swim in the morning (not just in the afternoon)
Without a solar cover: The pool is cold in the morning (18-20°C, cooled down by overnight evaporation). You wait until the afternoon (the pool warms up to 22-24°C in the sun). With a solar cover: The pool stays warm overnight (evaporation stops) → 22-24°C in the morning → you swim in the morning (before work) → more flexibility.

✓ People with small budgets (especially above-ground pool owners)
Above-ground pools cost €200-1,000 (purchase price). A heat pump (€2,000-4,000) would be more expensive than the pool itself (disproportionately expensive). Solar pool covers: €150-400 (depending on diameter) – much cheaper than a heat pump. Works well for small/medium-sized pools (3-5m diameter).

✓ People in sunny regions (Southern Germany, Austria, Switzerland)
Solar film works through sunlight . The more sun, the greater the heating. Southern Germany (Baden-Württemberg, Bavaria): 1,800-2,000 hours of sunshine/year → solar film is very effective (+4-8°C). Northern Germany (Schleswig-Holstein, Lower Saxony): 1,500-1,700 hours of sunshine/year → solar film is less effective (+2-4°C, but still worthwhile).

✓ People who appreciate GeoBubble technology (durable + robust)
Standard solar films (with round bubbles): Last 3-5 years (UV radiation damages the material, bubbles burst). GeoBubble technology (patented bubble shape): Lasts 5-7 years (25% longer lifespan, reduced material tension). More economical in the long run (less frequent replacement).

Product description: When round shape meets efficiency

The concept: Round liner for round pools – perfect fit

Many solar pool covers are offered in rectangular shapes (standard). The problem with round pools: a rectangular cover on a round pool = a lot of overhang (the cover extends beyond the pool edge) = impractical (blows away in the wind, rubs against the pool edge) = poor fit.

The solution: Sol+Guard round solar film

Custom-made round cover (exactly the diameter of your pool). Fits round pools perfectly. No corners, no folds, no overhang – just perfect coverage.

Compatible with:

• Steel wall pools (round, Ø 3m-6m)
• Above-ground pools (Quick-Up, Frame pools, round)
• Round built-in pools (stainless steel, GRP, concrete)

Standard diameter: Ø 3.0m, Ø 3.5m, Ø 4.0m, Ø 4.5m, Ø 5.0m, Ø 5.5m, Ø 6.0m

Special sizes: Other diameters available upon request (email – we manufacture individually).

GeoBubble technology – 25% longer lifespan

The problem with standard solar films:

Standard films have round bubbles (air bubbles that insulate). Problem: Round shape = stress points (at the junctions between bubbles) → UV radiation concentrates there → material becomes brittle → bubbles burst → film becomes leaky → lifespan: 3-5 years.

The solution: GeoBubble technology

Patented bubble shape (developed through scientific research, not round).

What does GeoBubble look like?

Two interconnected hemispherical bubbles (like two domes touching). Connection: Gently curved (no sharp edges, no stress points).

Advantage:

• Reduced material stress (no stress points → fewer cracks)
• Improved UV resistance (UV radiation is distributed evenly → material ages more slowly)
• Longer lifespan (25% longer than standard films = 5-7 years instead of 3-5 years)

Plus: GeoBubble bubbles offer better buoyancy (the foil floats better on water) + better insulation (air layer between bubbles = thermal insulation).

Transparent blue-turquoise – 80% light transmission

Colour: Transparent blue-turquoise (slightly tinted, not completely transparent).

Why not completely transparent?

Completely transparent films (clear, like cling film) allow 100% light to pass through → more algae growth (sunlight = algae food). Blue-turquoise tinted films (like Sol+Guard) allow 80% light to pass through → less algae growth (20% light blocked) + still effective heating (80% light is perfectly sufficient).

How much solar energy gets through?

80% from the visible + infrared spectrum. Visible light (which we see) + infrared light (heat radiation) = together 80% of the sun's energy reaches the water.

Practical tip: On a sunny day (30°C air temperature, full sun): The pool heats up by +4-8°C over 2-3 days (depending on starting temperature, pool size, and solar radiation).

500 micron material thickness – Robust + durable

Material thickness: 500 microns (0.5 mm).

Is that thick or thin?

Standard solar films: 300-400 microns (thin, less robust).
Sol+Guard: 500 microns (thicker, more robust).
Premium solar films: 600-800 microns (very thick, very robust – but also more expensive).

Advantage of 500 microns:

• More robust than standard liners (less prone to tearing from sharp objects – branches, pool edges)
• Longer lasting (lasts 5-7 years with GeoBubble technology)
• Better insulation (thicker material = better thermal insulation)

Disadvantage: Somewhat heavier (more difficult to handle when putting on/taking off – but still manageable for 1-2 people with round pools <Ø 5m).

Evaporation reduced by 98% – water and heat saved

The problem without solar film:

Evaporation is the main cause of heat loss in pools. Water evaporates from the surface (especially at night when the air is cooler than the water) → takes heat with it → the pool cools down.

Figures (round pool Ø 4.5m, 16 m²):

• Unheated, 24°C water temperature, 15°C night temperature
• Without a cover: Pool loses 3-4°C overnight (due to evaporation and radiation)
• Water loss: 5-10 mm daily = 80-160 liters/day = 2,400-4,800 liters/month

With Sol+Guard solar film:

The foil forms a barrier between water and atmosphere → evaporation is reduced by 98% → pool only loses 0.5°C overnight (instead of 3-4°C) → water loss: only 20-50 liters/month (instead of 2,400-4,800 liters).

This saves:

• Water: 2,400-4,500 liters/month (= 7,200-13,500 liters/season over 3 months)
• Water costs: At €4/m³ = €29-54 saved per season
• Chemicals: Less frequent refilling = more stable pH value = less pH reducer/chlorine needed = €20-40 saved per season
• Heat: Pool stays warm overnight = ready for swimming in the morning

Heat retention + temperature increase – double effect

Heat retention (at night):

GeoBubble bubbles = air layer = thermal insulation. Air is a poor conductor of heat than water → heat stays in the pool (is not released into the atmosphere).

Plus: Evaporation stopped (film forms a barrier) → no evaporative cooling → pool stays warm overnight .

Practical: Evening temperature 24°C → cover with foil → morning temperature 23.5°C (only -0.5°C lost instead of -3°C).

Temperature increase (during the day):

Transparent material allows 80% of solar energy to pass through → heat enters the water → heats the water → greenhouse effect (film lets heat in, keeps it in).

Practical: Morning 20°C → leave the foil on during the day (full sun, 8 hours) → evening 24°C (+4°C through solar energy).

The cycle:

• Day 1, morning: 20°C → cover on during the day (sunshine) → evening: 24°C → cover on at night → morning. Day 2: 23.5°C
• Day 2, morning: 23.5°C → foil on during the day → 26°C in the evening → foil on at night → Day 3, morning: 25.5°C
• After 3-5 days: Pool has reached 26-28°C (equilibrium – pool does not heat up further because heat losses = heat gains)

Dirt control – leaves/insects stay out

Side effect: Solar film = cover.

Practical: Foil lies on the pool → leaves/pollen/insects fall onto the foil (not into the water) → pool stays clean .

This saves:

• Netting: Fewer leaves in the water = less netting (1-2 hours/week saved)
• Filter cleaning: Less dirt = filter clogs more slowly = less frequent backwashing
• Algicide: Less organic material (leaves/pollen) = fewer nutrients for algae = less algicide needed.

Plus: The foil is slightly opaque (blue-turquoise tinted) → reduces sunlight in the water (blocks 20%) → less algae growth (algae need sunlight to grow).

Custom-made round – Perfect fit for your pool

The Sol+Guard solar film (round) is custom-made (not a standard size).

Round shape: Fits perfectly with round pools (no corners, no wrinkles, no overhang).

After ordering:

• They specify the diameter (inside diameter of your pool – from wall to wall).
• The manufacturer produces the foil exactly to your diameter (cut round).
• A liner is included (fits your pool perfectly)

Standard diameter: Ø 3.0m, Ø 3.5m, Ø 4.0m, Ø 4.5m, Ø 5.0m, Ø 5.5m, Ø 6.0m

Important: Measure precisely (inner diameter of the pool – from wall to wall). Recommendation: The liner should be 5-10 cm smaller than the pool (so the liner doesn't rub against the walls → less wear).

Custom sizes: Do you need a larger diameter (>Ø 6m)? An oval shape (see rectangular product)? → Email us for a quote – we manufacture to order.

Important: Custom-made = no returns/exchanges possible (as with all custom products).

Technical specifications at a glance

Material:

• GeoBubble technology (patented bubble shape)
• Material thickness: 500 microns (0.5 mm)
• Color: Blue-turquoise, transparent

Perfomance:

• Light transmission: 80% (visible + infrared spectrum)
• Evaporation reduction: Up to 98%
• Temperature increase: +2-8°C (depending on solar radiation)
• Heat loss overnight: Only -0.5°C (instead of -3-4°C)

Longevity:

• Lifespan: 5-7 years (25% longer than standard films)
• UV-resistant, weather-resistant

Form:

• Round (custom-made to the diameter of your pool)
• Standard diameter: Ø 3.0m to Ø 6.0m
• Special sizes: Available on request

Advantages:

• Free heating (solar energy = free)
• Water savings: 2,400-4,500 liters/month (for a 4.5m diameter pool)
• Chemical savings: 30-50%
• Swimming season extended by 3 months (April-October instead of June-August)
• Dirt control: Leaves/insects stay out
• Perfect fit for round pools

Scope of delivery

✓ Sol+Guard pool solar cover (custom-made, round)
✓ GeoBubble technology (patented bubble shape)
✓ 500 micron material thickness
✓ Transparent blue-turquoise

Why people choose the Sol+Guard solar film (round)

"My steel-walled pool (Ø 4.5m, unheated) was only usable from June to August (3 months) without a solar cover. With Sol+Guard: April to October (7 months). The pool heats up faster in spring and stays warm longer in autumn. Swimming season doubled!"
– Mr. K., 48 years old, steel wall pool

"Rectangular solar panels didn't fit (too much overhang, blew away in the wind). Round Sol+Guard: Perfect fit (custom-made to Ø 5m). Lies flat, no overhang, no hassle."
– Mrs. M., 42 years old, round built-in basin

"My above-ground pool (Intex, Ø 3.6m) lost 3,000 liters of water every month (evaporation). With a solar cover: only 100 liters/month. I save 2,900 liters/month = less use of the garden hose."
– Mr. S., 55 years old, above-ground pool

"Ge oBubble technology really does last longer. My old standard film (round bubbles) burst after 3 years. Sol+Guard: Now 6 years old – still intact. Better investment."
– Mrs. L., 62 years old, long-term user

"The pool was always 19°C in the mornings (too cold). With a solar cover: 23°C in the mornings (evaporation stopped, heat stored). I now swim in the mornings before work – previously only possible in the afternoons."
– Mr. T., 51 years old, early morning swimmer

"A heat pump would have cost €3,000 (too expensive for my above-ground pool). A solar cover: €280. It works more slowly (the pool takes 3-4 days to heat up) – but it uses zero electricity. Perfect for a small budget."
– Couple, above-ground pool, budget-conscious

Frequently Asked Questions – Honest Answers

Q: How much warmer will my round pool actually get?
A: Depends on sunlight, location, pool size, and starting temperature. Typically: +2-4°C in cloudy weather (diffuse light), +4-8°C in sunny weather (full sun), over 3-5 days. Example: Pool starts at 18°C ​​(early May) → after 5 days of sun with a solar cover → 24-26°C.

Q: Does the round liner also fit oval pools?
A: No (round liner = circle, oval pool = ellipse). For oval pools: Use rectangular liner (cut to fit the larger side of the oval) or custom-made (email inquiry – we manufacture individually).

Q: How do I correctly measure the diameter of my pool?
A: Measure the inner diameter (from inside wall to inside wall, through the center of the pool). Recommendation: Order a liner 5-10 cm smaller (to prevent rubbing against the walls). Example: Pool Ø 4.5m (inner diameter) → order a liner Ø 4.4m.

Q: Does solar pool cover also work with above-ground pools (Intex, Bestway)?
A: Yes (perfect for above-ground pools). Above-ground pools are usually unheated (heat pumps are too expensive) → a solar cover is a cheap alternative. Works very well with smaller pools (Ø 3-4.5m – they heat up faster than larger pools).

Q: Do I need to leave the solar cover on during the day (or remove it)?
A: For heating: Leave it on (cover on pool during the day → sun heats water → greenhouse effect). For swimming: Remove it (cover must be removed – you can't swim through a cover). Practical: Leave the cover on in the morning (pool heats up), remove it at midday/afternoon (for swimming), put it back on in the evening (retains heat overnight).

Q: How long does the solar film last (lifespan)?
A: 5-7 years (with GeoBubble technology, 25% longer than standard films). Factors: UV radiation (sun slowly destroys material), chlorine concentration (high chlorine content = faster wear), handling (careful handling = longer lifespan).

Q: How do I store solar film (when not in use)?
A: Summer: Use daily (put it on in the morning, take it out for swimming at midday, put it on again in the evening). Winter: Roll it up → store it in a dry place (cellar, garage, pool house) → protect it from direct sunlight (UV radiation ages the material). Do not: Store it folded (creases = stress points = cracks).

Q: Does solar pool cover also work for saltwater pools?
A: Yes. GeoBubble material is saltwater resistant (no corrosion, no decomposition). Same lifespan as chlorine pools.

Q: Can I also use solar film in winter (as a winter cover)?
A: Conditionally. Solar covers protect against dirt (leaves stay out) and reduce evaporation. However, solar covers are not designed for snow loads (500 microns = too thin for heavy snow loads). For above-ground pools (which are dismantled in winter): Not relevant. For in-ground pools with heavy snowfall: A winter cover is necessary.

Q: How do I handle round solar film (applying/removing)?
A: Small pools (< Ø 4m): 1 person is sufficient (roll up the cover → lay it out on one side → unroll it over the pool). Larger pools (> Ø 4m): 2 people recommended (each on one side → unroll together). Tip: Buy a roller (optional) → the cover stays rolled up at the pool edge → easier to roll up/down.

Secure your free pool heating + water savings now!

If you have a round pool. If you want to heat it cost-effectively. If you love warm water – without an electricity bill.

The Sol+Guard (round) pool solar cover is designed for people with round pools (steel wall, above-ground pools, in-ground pools) who want to extend the swimming season and reduce operating costs – and who want to invest in scientifically developed quality.

Free. Effective. Perfect fit.

👉 Order your Sol+Guard (round) pool solar cover now

✓ Water temperature +2-8°C (through solar energy)
✓ Evaporation reduced by 98% (water + heat saved)
✓ GeoBubble technology (25% longer lifespan)
✓ Transparent blue-turquoise (80% light transmission)
✓ 500 micron material thickness (robust)
✓ Swimming season +3 months (April-October)
✓ Dirt control (leaves stay out)
✓ Custom-made round (perfect fit, Ø 3-6m)
✓ Zero operating costs (sun = free)

Or would it be better to seek advice first?

👉 Free consultation + measurement request

✓ Non-binding
✓ Which diameter fits your pool?
✓ Special sizes available? (>Ø 6m, oval)
✓ Email request for custom dimensions

Cover it with foil. The sun is shining. The pool is getting warm.

The Sol+Guard (round) solar pool cover isn't just "a cover." It's your free pool heater . Your water savings. Your extended swimming season. GeoBubble technology since 1999. Proven in hundreds of thousands of pools worldwide. Perfect fit for round pools.

Your hot water. Your savings. Your Sol+Guard.

You have a steel-walled pool (4.5m diameter, invested €2,500). But you only use it for 3 months (June-August). For 9 months it sits empty or dismantled. That's a waste.

The Sol+Guard (round) solar pool cover extends your swimming season to 7 months (April-October). You use your pool more = better return on your investment. Plus: zero operating costs (sunlight is free). Perfect for round pools.

Get the Sol+Guard (round) pool solar cover now – and experience how your round pool becomes a warm oasis of well-being.

Note: This product is custom-made to your measurements. Please understand that returns/exchanges are not possible for custom-made products.