I have an Intex Easy Set 12'x30" AGP and 1x Intex Solar Heater Mat (model no. 28685E). I have the 1,000 GPH Intex pump.
Right now, it appears to give some improvement to the temperature of the water, but would two of these mats in a series essentially double the results I'm currently getting? For the most part, I get in the low to mid eighties on a very sunny, warm day, and my pool temp usually starts its day around 830, 9am at 77 degrees F.