this is what ive done... a massive 300 meter long garden hose pipe, Tightly coiled up and stuck down to my black garage roof.
Works fantastic.
RGD-Audio-Repairs
what's the best kind of black hose to get or does it matter?
ielts-Pro-Online
Longer hose more heat on the hose your pool is too big
Chris-zxdz
This thing doesn't do much of anything from what I've seen. My neighbor buddy has a Beluga and it doesn't seem to make any difference in pool temps (Northeast US). He has this running constantly and when my pool heater hasn't been used, our pools are still the same temperature. We both also get the same amount of sun. His pool will be the same as ambient 65-70 while mine is 78-80 with a heater in the spring and fall otherwise. I think you would need hundreds of feet of hose, a dedicated pump, and of course a lot of sun for this to have any quantifiable impact on a large volume of water. This is advertised as a cheap solution but logistically it takes significantly more effort to have any noticeable effect (and at that rate it's still only supplementary and nothing close to a heater). If you live in the south, you don't need this, and if you live in the north, you need a real heater.