Warm up a swimming pool by submerging black-painted milk jugs in it


I know they make solar covers for pools, but I that is a bit of a pain to put on and take off all the time and my cover (from a well known manufacturer) from last year was easy to rip and became brittle and fell apart in a few thousand pieces at the end of the summer.

I was thinking about taking milk jugs, pouring a bit of black paint in them to coat the inside, letting them dry, and then submerging them in the pool. This sounds like it would be more effort than the solar cover, but I don't think I would need to remove them every time. Also, they could double as weights to keep the normal cover on when it storms.

Are there any DIY solutions that work well to really warm up a pool?

I live in Ohio, USA if that matters/helps.

Best Answer

As others have said milk jugs are too small and much of your heat loss is due to evaporation.

An alternative would be to build these "lily-pad-pool-warmers".

They are basically hoola hoops with black plastic sheeting stretched across them. You make a bunch of them and then float them on the pool. How much good they do will depend on how much of the surface they cover.