Liquid solar covers are about 75 percent as effective as solar blankets at retaining heat. But remember, it works constantly without your having to remember to cover the pool at night.Click to see full answer. Simply so, do solar pool blankets really work?Conclusion: Solar Covers do really work! Both to retain heat and reduce humidity, and when used on outdoor pools, they also add heat to the pool (Liquid Solar does not add heat). There seems to be a bit of a trade-off in convenience for effectiveness within this product category.Subsequently, question is, what solar cover for pool is the best? At a Glance: Our Top Picks for Best Solar Pool Cover: Intex Solar Cover for Frame Pools (Top Pick) Intex Solar Cover for Rectangular Pools (Top Rated) Sun2Solar Rectangular Solar Cover (Editor Choice) In the Swim 8Mil Pool Cover. Blue Wave NS 110 Solar Cover. In respect to this, how long can you leave solar blanket on pool? Over time, your solar cover will slowly deteriorate. You will need to replace your solar cover when it begins to flake and when bubbles begin to fall off of it. Most solar covers last for up to three years, though many people replace them more frequently.How does a pool blanket work?In addition to heating the water, a solar blanket helps prolong the effectiveness of pool’s chemicals. A solar blanket looks like a large sheet of bubble wrap. It effectively heats the pool water by allowing more of the sun’s rays to enter the pool, while its air bubbles trap the pool’s heat during the night.