Trying to come up with ways to warm my 18x33x4 above ground IL pool -cheaply. Just invested in a clear solar cover to help and hubby thinking of making his own solar heater. Has anyone had much luck with a DIY solar heater? Current plan is to put it on garage roof (west facing) would use a sump pump or other pump to pump the water as connecting it to our pool pump would be difficult based on location. Basically just want something to warm it up for May,June and then Sept. Wouldn't need to run it during hottest part of summer. Pool is complete sun so hottest part of summer feels like bath water without anything. Any suggestions on DIY designs or don'ts? He was looking at this site ____ WhereIsHolden?: Solar Thermal + Cheap = Inexpensive Pool Heater! and was going to do something similar with about 1000 ft of black tubing. Will 1000 ft of tubing make a difference? The garage has a light colored metal roof if that matters and is in mostly sun.
He is currently planning on spending about $300 including the pump though know from experience additional parts/items will be needed and should always add 25% or so to his estimates.