Heavy Duty Tarp or Solar Blanket to keep heat in

tagteamcomputing

Gold Supporter
Feb 7, 2017
170
Tulsa, OK
Does anyone know if it is better to lay a heavy duty tarp over the hot tub or to use one of those floating solar blankets to keep heat in.

When i use my hot tub at night and I plan to use it in the next few days I would like to trap some of that heat in there so I don't have to reheat all the water.

Thanks for any help.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
12,878
Northern NJ
I don’t think it makes a big difference. Most of the heat lost is due to evaporation. Any cover that reduces evaporation should work ok.
 

tagteamcomputing

Gold Supporter
Feb 7, 2017
170
Tulsa, OK
The tarp is cheaper but it then sits about 1 foot over the water and I have two spillover sections that leave a gap. I wonder if I used a solar cover and a tarp if I would get double the savings of heat or if the diminishing marginal returns would be too great and I would only benefit by about 30% or something. I guess the only real way to know would be to test both.