Bubble side down. The bubbles diffuse the sun's rays into the water warming it better than if the smooth side was down. Actually it will warm your pool a good 5 to 8 degrees more with the bubbles down (facing the water). Plus it adheres to the water better in windy situations. It is also easier to sweep or clean the solar blanket when the smooth side is up.

Blue Wave NS420 12 mil Solar Blanket for Rectangular In-Ground Pools, 16' W x 32' L x 0.5" H, Blue

Blue Wave NS420 12 mil Solar Blanket for Rectangular In-Ground Pools, 16' W x 32' L x 0.5" H, Blue

Q: Will this help me save water by reducing the evaporation? Or will it heat up the water and cause more to evap?

Even though the water heats up, it's trapped under the cover which minimizes the evaporation rate. (It would reduce it completely if it was totally sealed) There will be minimal evaporation around the sides, and if there are any holes that allow water to come to the top, but my "refill" rate has been cut at least 75-80%. Here during the summer, I used to have to refill every 7-10 days. So far I've done it only once in the last few weeks. Not sure if I can share links, but there is an article on energy (dot) gov on Swimming Pool Covers and it references some good stuff.

Q: If I don't have a heater for my inground pool will this cover help to warm the water?

Florida: 60 degrees...Utah: 80 degrees..... Solar covers are much more effective (and necessary) in the dry sunny climate found west of the Rockies than in the more humid climate east of the divide. In dry climates pools get cold even with lots of sun because almost all pool heat is lost through evaporation, and solar covers effectively reduce that. In June and July, solar radiation keeps my pool at 80-83 degrees if I cover the pool immediately after swimming to prevent evaporation.

Q: can I leave the solar cover on the pool for the winter (Florida, no freezing temp)

Sure, you can leave the solar cover on. It will still add some heat into the water but the better use is that it will keep debris out of the pool. Even if the pool is not used during the winter season.

4.1/5

Product ID: 621468937

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Details

Material
Plastic
Colour
Blue
Brand
Blue Wave
Special feature
Durable
Style
12-MIL

🌞Heats pool up to 15°F

💧Prevents 95% water evaporation

🛡️Durable 12-mil polymer build

Frequently Bought Together

Blue Wave 16-ft x 32-ft Rectangular Pool Solar Blanket - 12-mil Solar Pool Cover with Thermal Bubbles to Retain Heat and Reduce Evaporation – Fade Resistant Pool Solar Cover for Inground Pool - Blue

Intex Deluxe 800 GPH+ Wall-Mounted Swimming Pool Surface Automatic Skimmer

Description

🌊 Dive into longer, cleaner, and warmer swims with Blue Wave’s solar magic!

TAILORED TO YOUR POOL - Easily trim the heavy-duty, fade-resistant cover for a perfect, custom fit that lasts season after season.
PEACE OF MIND WARRANTY - Backed by a 5-year limited warranty, ensuring durability and long-term pool comfort you can trust.
SAVE WATER CHEMICALS - Reduce evaporation by up to 95%, cutting down on costly refills and chemical treatments effortlessly.
EXTEND YOUR SWIM SEASON - Harness solar power to naturally warm your pool by up to 15°F, making every swim longer and more enjoyable.
KEEP IT SPARKLING CLEAN - Blocks leaves, bugs, and debris, so your pool stays pristine with less maintenance and more relaxation.

The Blue Wave NS420 12-mil Solar Blanket is a robust, fade-resistant pool cover designed for rectangular in-ground pools (16' x 32'). It naturally heats your pool by up to 15°F, reduces water and chemical evaporation by 95%, and keeps debris out, all while offering a customizable fit and a 5-year limited warranty for lasting performance.

Specifications

Product Dimensions	975.36 x 487.68 x 1.27 cm; 453.59 g
Part number	NS420
Item display height	17 inches
Item display length	50 inches
Item display width	17 inches
Item display weight	12.93 kg
Material type	Plastic
Seasons	Summer
Manufacturer	Blue Wave
Item model number	NS420
ASIN	B003TQMCAS

Have a Question? See What Others Asked

which side down

Will this help me save water by reducing the evaporation? Or will it heat up the water and cause more to evap?

If I don't have a heater for my inground pool will this cover help to warm the water?

can I leave the solar cover on the pool for the winter (Florida, no freezing temp)

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