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

I held off writing a review until I had some time with this product. My pool is 25,000 gallons in the mid west. I have been adding 5oz every week for about 5 weeks. The evaporation loss has been minimal. I normally have to add water every couple of weeks, but not at all this year so far. There have been rains, but there are every year.What I was having trouble measuring was the solar blanket portion of their claim. Yesterday my pool was 83, this morning at 7 am it was 79. Our outside had dropped to 55 because of cold front that passed through. 4 degrees, but the interesting thing is that by this afternoon it had climbed back up to 82 under partly sunny skies and a high temperature of 75. I did not run the heater at any point.

So, in the morning my pool temp is 75 degrees even if I heated it to 82 the prior day. It will always drop significantly overnight. Heated it yesterday to 81 added 4oz of this, Temps dropped to low 60's overnight, woke up in morning and my pool temp was 80. I would say it works pretty well!

My wife says she has used this before. We are at stage 5 drought restrictions so we have to use this. Have not had to add water since we started using this again.

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.

We have found out that if you have a wasp issue this product effectively “drowns” them when they attempt to take water from your pool. We tried other “pool cover” products to reproduce this effect to no avail. We average about 30 dead wasps within 24 hours of placing 2 capfuls in our 40,000 cu ft pool.

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.

My main goal was to reduce evaporation, not heat the water. And it seems to help even in our extremly hot and windy Tucson climate. But not as well as a floating bubble cover. So I went back to that. And yes, the floating bubble cover is a hassle to take off and put back on, so I am getting a reel.

Dont know if it actually works. Dont keep in a heated storage area and the liquid becomes solid.

Llegó sellado y nuevo, pero la evaporación es igual y el nivel de cloro se pierde igual que cuando no tenía el líquido. Recomiendo mejor una cubierta plástica en lugar de la solución. La cubierta plástica evita pérdida excesiva de cloro y aumenta la temperatura del agua.

I put this in the pool and immediately the entire pool was covered in foam like a giant bathtub. Two days later and the entire pool is this disgusting milky white and you cannot see the bottom.It has had zero effect on evaporation.What the hell is this crap that has made my pool unuseable?