Do I Need a Pool Blanket? Complete Cover Benefits Guide

Benefits of Pool Blankets

Chemical Savings and Water Quality

Pool blankets provide substantial chemical savings by blocking UV rays that break down chlorine. Without a cover, your pool loses chlorine rapidly due to photodegradation. With proper CYACyanuric Acid (stabilizer) — Sunscreen for your chlorine — it keeps sunlight from burning it off. The catch: the more you have, the more chlorine you need to keep. learn more → (stabilizer) levels of 30-50 ppm and a pool blanket, you can maintain your target FCFree Chlorine — The chlorine actively sanitizing your water right now. This is the number you keep an eye on. how much you need → (free chlorine) levels with significantly less liquid chlorine.

For example, an uncovered 20,000-gallon pool in Arizona might require 2-3 gallons of liquid chlorine weekly during summer, while the same pool with a quality solar cover might only need 1-1.5 gallons weekly. This translates to $150-400 annual savings on chemicals alone.

Water Conservation

Evaporation is the single largest source of water and heat loss in pools. An uncovered pool can lose 1-3 inches of water weekly depending on temperature, humidity, and wind. Pool blankets reduce evaporation by 95%, saving thousands of gallons annually. In drought-prone areas or regions with expensive water, this becomes a critical consideration.

Energy Savings

If you heat your pool, a blanket is almost essential. Solar covers can raise water temperature 5-10°F through passive solar heating while preventing heat loss overnight. Gas heater costs can be reduced by 50-70% with consistent cover usage. For heated pools, the blanket typically pays for itself within one season through energy savings alone.

Types of Pool Blankets

Solar Covers (Bubble Covers)

These are the most common and cost-effective option, featuring air-filled bubbles that provide insulation and solar heating. Quality varies significantly - look for covers with UV inhibitors and 12-16 mil thickness. Brands like In The Swim and Sun2Solar offer better durability and heat retention.

Liquid Solar Covers

Chemical products that form an invisible molecular layer on the surface. While convenient, they only provide 15-25% of the evaporation reduction of physical covers and offer no heating benefit or debris protection.

Safety Covers

Anchored covers (available in mesh or solid) that secure across the pool for maximum protection; many are owner-installed via a spring-and-anchor system, though larger or custom covers may warrant professional fitting. These are ideal for seasonal closing or when pools won't be used for extended periods.

When You Might Skip a Pool Blanket

High-Usage Pools

If your pool sees constant daily use throughout the swimming season, the inconvenience of removing and replacing a cover might outweigh the benefits. However, even high-use pools benefit from overnight covering.

Saltwater Pools with High CYA

Saltwater generator pools are actually recommended to run higher CYA — about 70-80 ppm — because the extra stabilizer protects the chlorine the cell generates from UV, reduces how hard the cell has to work, and extends cell life. (30-50 ppm is the range for traditional liquid/tablet chlorine pools.) While covers still provide benefits, the chemical savings are less dramatic compared to traditional chlorine pools.

Shaded Pools

Pools with natural shade from trees or structures already have reduced evaporation and UV exposure. However, covers still prevent debris accumulation and provide some energy savings.

Climate Considerations

Hot, Dry Climates

Desert regions like Arizona, Nevada, and Southern California see the most dramatic benefits from pool covers. High temperatures, low humidity, and intense UV exposure make covers nearly essential for reasonable operating costs.

Humid Climates

Areas like Florida and the Gulf Coast have lower evaporation rates due to humidity, but still benefit significantly from UV protection and debris prevention. The heating benefit is particularly valuable during cooler months.

Northern Climates

Shorter swimming seasons make covers crucial for extending usability and protecting water quality during shoulder seasons. Winter covers become essential for proper pool closing.

Cost-Benefit Analysis

A quality solar cover for an average 16x32 pool costs $150-300. Annual savings typically include:

• Chemicals: $150-400 depending on climate and pool size
• Water: $100-300 based on local rates and evaporation
• Heating: $300-800 for heated pools
• Cleaning time: 2-4 hours weekly labor savings

Most pool owners see payback within 6-18 months, with covers lasting 3-5 years with proper care.

Common Mistakes to Avoid

Don't buy the cheapest cover available - thin covers (8-10 mil) deteriorate quickly under UV exposure and provide poor insulation. Invest in 12+ mil thickness with UV inhibitors.

Avoid leaving covers on constantly - pools need air circulation and gas exchange. Remove covers for several hours weekly (especially important for solid covers), particularly during algae bloom risk periods or when performing water testing.

Don't ignore water balance - covers can trap gases and affect pH stability. Test water 2-3 times weekly and maintain proper TATotal Alkalinity — The buffer that keeps your pH from bouncing around. Get this in range and pH gets a lot easier to manage. learn more → levels (80-120 ppm for traditional pools, 60-80 for saltwater) to prevent pH drift.

Maintenance and Storage

Clean covers monthly with mild soap and rinse thoroughly. Improper storage causes premature failure - use a cover reel or storage system that prevents folding and cracking. Remove covers immediately if algae appears, as trapped organisms can rapidly multiply in covered conditions.

For the full breakdown of safe chlorine levels by CYA level, see our pool water chemistry guide.

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