Intex Rectangle Pool Solar Cover (18' × 9') — Heat Your Pool Cheap and Easy

If you have an 18' × 9' rectangular frame pool, the Intex Solar Pool Cover is one of the easiest ways to heat a pool cheap — literally! Designed to fit rectangular frame pools, this rectangle pool solar cover helps capture sun energy, reduce evaporation, and keep your water warmer without the cost of a heater. Below we’ll explain what it does, how to use it, and why a solar cover is one of the best cheap ways to heat a pool.

What is a rectangle pool solar cover?

A rectangle pool solar cover (also called a solar blanket) is a thin, bubble-textured sheet that floats on the water. The Intex model sized for 18' × 9' rectangular pools traps sunlight and transfers heat into the water while cutting evaporation and chemical loss. It also comes with a carrying storage bag so you can store it easily when not in use.

Key benefits — why use the Intex solar cover:

• Heat your pool cheap: Solar covers warm water using sunlight instead of energy-hungry heaters — a classic heat pool cheap solution.

• Reduce evaporation: Less water loss = fewer top-offs and less money spent on chemicals.

• Lower chemical usage: Slower evaporation and reduced debris contact helps chlorine and other chemicals last longer.

• Extend the season: Warmer water in spring and fall means more swim days without expensive equipment.

• Easy storage: Comes with a carrying storage bag for compact off-season storage.

Key features of the Intex 18' × 9' Solar Cover:

• Perfect fit for 18' × 9' rectangular frame pools — designed to match common rectangular frame pool dimensions.

• Bubble insulation design — the bubble layer captures solar heat and floats on the surface to transfer warmth.

• Lightweight & easy to handle — easy for one person to put on and remove.

• Carrying storage bag included — keeps the cover tidy and protected between uses.

• Affordable: A low-cost upgrade compared to electrical pool heaters — a true heat pool cheap option.

How it works — simple science!

The bubble layer acts like tiny greenhouses: sun hits the cover, heat transfers into the water beneath, and the bubbles trap that warmth. Because the cover floats, it reduces surface heat loss at night and slows evaporation by 95% — so your pool stays warmer for longer and uses less water and chemicals. For best results, place the rectangle pool solar cover on the water during sunny daytime hours and remove it only when pool is in use (leave it on overnight for maximum heat retention).

Maintenance & tips to maximize heat:

• Keep it clean: Rinse the cover occasionally to remove dirt and oils that block sun absorption.

• Use during the day for fast heating: Lay the cover on the water (bubble side down!) during sunny hours for maximum heat gain.

• Night coverage for retention: If you want warmer mornings, leave the cover on overnight.

• Avoid chlorine spots: If you add liquid chlorine, wait a short time and circulate before placing the cover to prevent concentrated chemical contact.

• Repair small tears: Some covers can be patched with clear tape or vinyl repair kits — check the manufacturer guidance.

Pros & cons — honest look:

Pros

• Low cost compared to electric heaters — excellent heat pool cheap strategy.

• Reduces evaporation and chemical loss.

• Lightweight and easy for one person to handle.

• Fits common 18' × 9' rectangular frame pools and includes a storage bag.

Cons

• Not a safety cover — can’t replace fences or purpose-built safety gear.

• Can be awkward to remove for frequent swimmers (a reel helps).

• Effectiveness depends on sunlight and air temperature — it’s a passive solution, not a heater.

• Durability can be a concern. However, most customers say that its cheap price (around $40) was worth it, even if they only get 1 season out of it.

Who should buy this cover?

• Owners of 18' × 9' rectangular frame pools who want the cheapest way to heat a pool without buying a heater.

• People in mild climates who want to extend swimming season by a few weeks.

• Pool owners looking to reduce chemical costs and evaporation.

Quick FAQ

Q: Will a solar cover heat my pool overnight?

A: Solar covers trap heat best during sunny days; they slow heat loss overnight but are not an active heater. For best morning temps, leave the cover on overnight.

Q: Can I cut the cover to fit irregular pools?

A: Some trimming is possible but check the manufacturer guidance. Cutting may void warranties — measure and confirm before trimming!

Q: How much warmer will my pool get?

A: Results vary by sun, air temp and wind. Typical gains range from a few degrees up to 10°F during sunny days when used properly — making it an effective way to heat a pool cheap.

Final thoughts

If you want a cheap, low-maintenance way to heat your swimming pool, the Intex Solar Pool Cover for 18' × 9' rectangular frame pools is a smart, budget-friendly choice. It’s a top rectangle pool solar cover option that helps you heat your pool cheap, reduce evaporation, and cut chemical costs — all with minimal effort.

Ready to keep your pool warmer without the high cost of a heater? Grab the Intex rectangle pool solar cover and the included storage bag today — your wallet (and swim schedule) will thank you!

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