Natural Chemistry 07100 Spa Swimming Pool COVERfree Barrier Layer - 32oz Each

I've used this before & it works great. A whole lot better than a solar cover.

Great product

Look. The product does what it says it does which is retain the heat in your pool. It does not raise the temperature.I wasn't sure what to expect so I got it to try it out as our pool heater is currently out of commission. I've used it for about 2 months and here's what I can say:When I use the product I notice that my pool maintains temperature much better. I seem to have a consistent temp of about 84 when I use it, morning, afternoon and evening.When I don't use the product I get up to 84 but usually I start the day about 80 and slowly work my way to 84 by about 6pm....then the temp slowly drops back to 80 overnight and repeat.So from my 2 month experience, it does retain the heat much better then if your not using it but don't expect miracles. It's not a heater and it's not going to generate heat...but it will retain heat better then using nothing. Again not a huge amount....about 3-4 degrees. But it's something. For some people that may br enough and for others it may not be.My only wish was that it was cheaper. 1 bottle will get you about 3 applications (we have a larger inground pool). If you apply it weekly like it says that's 3 weeks of usage.

Works great on evaporation!

I've used this product for three weeks and I have my pool filler on a device that measures precisely how much water I'm adding. So far there is no obvious change in water usage, certainly nothing dramatic. Of course it is hard to be certain since temps and wind are highly variable so unless you have very consistent weather and do some back to back trials it would be hard to isolate the effect unless it was very dramatic.Really in terms of water loss my water costs $0.005 per gallon so at current retail prices the 4 floz weekly addition for my pool costs $3 so that would require saving 600 gallons of water over the week or 85 gallons per day. Given my daily average usage right now, with ~100F daily temps is about 100 gal per day I would definitely have noticed that kind of savings. At best I think it could be a few gallons per day.As for temperatures again it is really hard to isolate changing daily temps from any effect this might have but thus far I don't see anything significant.The only really positive thing I can say is this product is undetectable when added to my pool. No sheen or oil feel like people have said. I'm pretty certain those people must have added the entire bottle at once - i've definitely read a few reviews where they mention adding multiple doses and even 16oz at one go. If you're adding more than recommended you're definitely just wasting product for no added benefit. If you add the correct amount to a 400 sf pool the layer will be 3 microns thick. Literally a few thousand or so atoms thick and atoms are very very small.

Let's face it. A solar cover is a nuisance putting and and taking off, especially when you have a large pool. When the cover life ended, I decided to go with a liquid cover, understanding it would not retain water temperature like a solar cover. There are many factors to consider: night temperature, dewpoint, wind, and water temperature. With these factors, it is difficult to determine how well the product is working. I can only go by past experience with a solar cover. Typically, a solar cover on my pool would keep the pool water with 3 degrees Fahrenheit. I started using the liquid cover the past few weeks and easily lost 6 degrees a night. (84 to 78). With a solar cover, I would estimate end up dropping no lower than 82. Again, this is knowing the weather conditions, the pool, and experience with a solar cover. Is it worth it? I suppose it is, assuming nothing in the water would probably drop 8 degrees versus 6 degrees. If I go through a bottle a month, that's a bit over $100. Perhaps that alleviated my pool heater cost (heat pump). But I haven't looked at the numbers. Just understand before you buy this is not as efficient as a solar cover.

We have an irregular-shaped pool with a small deck surrounding it, so using a pool cover is difficult, and we don't have a pool heater as we live in central Texas. I read up on liquid thermal pool covers and thought I'd try it.This stuff does work as advertised. It will keep the temperature about 1-2 degrees warmer than normal. Even in early spring, when it got in the 50s and low 60s at night, the pool temp would be in the low to mid 70s in the morning. It would be a cold swim but adequate for workouts as you don't get overheated.Currently, the daytime temps are in the upper 80s and lower 90s and the water temperature has been 86 in the morning, reaching 89-90 degrees in the afternoon. It's actually too warm for exercise swimming so I've stopped adding the liquid cover for the summer, which has brought the temperature back down to mid-80s.A couple of key things to know: use the liquid cover weekly to ensure there is enough coverage and turn your pump off (or at least on low) during the night, as that is when the cover prevents heat from leaving.Obviously, the liquid cover doesn't stop debris, animals, or insects from getting into the pool but if you just want your pool season to be a bit longer, this is perfect for helping to retain heat. It also means you don't have to use your pool heater as much, if you have one.