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.

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Blue Wave NS400 mil Solar Blanket for Rectangular 12 x 20-ft In-Ground Pools Patio Umbrella, FT FT

Blue Wave NS400 mil Solar Blanket for Rectangular 12 x 20-ft In-Ground Pools Patio Umbrella, FT FT

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.

Product ID: 412753653

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Details

Size
975 x 488 cm
Colour
Blue
Material
Plastic
Brand
Blue Wave
Product dimensions
9.75L x 4.88W

💧Prevents up to 95% water evaporation

🔥Raises pool temp by up to 15°F

🛡️Durable 12-mil UV-resistant polymer

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

Pool Ruler Solar Cover Reel Attachment Kit

VINGLI Pool Cover Reel Above Ground Swimming Pool Cover Reel 16 FT Without Decking Solar Blanket Roller Systems with Tube Set for Various Shape Pool

Description

🌊 Dive into warmth and savings with Blue Wave Solar Blanket!

CONFIDENCE COVERED - Backed by a 3-year limited warranty for peace of mind and long-lasting performance.
SUN POWERED WARMTH - Passive thermal bubbles trap and retain heat, extending your swim season even on cloudy days.
ECO WALLET FRIENDLY - Cut water refills by up to 95% evaporation reduction—save money and conserve resources effortlessly.
TAILORED TO YOUR POOL - Easily trim-to-fit with a tough 12-mil thickness built to withstand intense sun and regular use.
LESS CLEANING MORE SWIMMING - Blocks leaves and debris, minimizing pool maintenance so you can focus on fun.

The Blue Wave NS400 Solar Blanket is a 12-mil thick, UV-resistant pool cover designed for rectangular 12 x 20-ft in-ground pools. It uses thermal bubbles to raise water temperature by up to 15°F while preventing up to 95% of water evaporation. Durable and customizable, it reduces pool maintenance and comes with a 3-year limited warranty.

Specifications

Age Range	Kid
Color	Blue
Size	975 x 488 cm (Rectangular)
Style	12-MIL
Display Size	13 Inches
Height	17 inches
Length	50 inches
Weight	28.5 Pounds
Width	17 inches
Shape	Rectangular
Material Type	Plastic
Number of Items	1
Number of Pieces	1
Season	Summer
Features	UV Resistant
Sport	Swimming
Included Components	16-ft x 36-ft Solar Blanket
Batteries Included?	No
Brand	Blue Wave
Manufacturer	Blue Wave
Item model number	NS420
Product Dimensions	975.36 x 487.68 x 1.27 cm; 453.59 g
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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