SeaKlear 90-Day Algae Prevention & Remover, 1 Qt

I just added this after bad storms with lots of rain. My pool looks clear and ready for swimming!

I am the Certified Pool Operator for my neighborhood pool and we have been battling mustard algae for the past two years. Last summer we did some crazy shock treatment with some other chemicals recommended by Leslies Pool Supplies that took 2 or three days and way too much work. The algae was back after awhile anyway. For those who do not know, mustard (yellow) algae is chlorine resistant so shocking the pool, much less regular chlorine levels, does not help much. Determined to find a chemical solution, I came across this product online. After mulling it over for a couple of weeks I decided to give it a try. Our pool holds 138,000 gallons and I decided to use 10 quarts of this stuff. The price here on Amazon was the best around and I got it via Prime in a couple of days. I like the fact that the pool just has to be reasonably balanced to put the chemical in. I shocked the pool to 12 ppm of Chlorine over night and put the SeaKlear in the next evening. I mixed each quart in a 5 gallon bucket with pool water and poured it around the pool, mainly the deep end. Only had the pool shut down for one day and that was mainly for the shock treatment. Well the first couple of days, I still saw some algae on the floor and was concerned it didn't work. It was not all brushed up beforehand. Well after it was brushed, I have not seen it in two weeks. The pool water is crystal clear, as well as the walls and floors and no mustard algae to be seen. Even disappeared from the drains on the bottom. Very impressed. Hopefully it will last the 90 days or more or at least until the pool is closed, which will be another 45 days or so. The pool attendants are very happy as well. I had them brush the pool constantly to try to keep this terror at bay. Only one little issue and I considered taking a star away for it but I am so giddy about that pesky mustard algae being gone I couldn't do it. The copper can stain, which is the main reason I premixed it. Well, it did not stain our pool at all afterwards using the technique described above. Little platinum blonde girls hair is another matter. Poor girl got out of the pool with hair almost as green as grass. LOL Fortunately her mother was able to get it out and is aware of the issue and puts special conditioner and protection on her hair to help prevent it happening or being as severe. Some ladies with colored/highlighted hair may have some issues as well but I have not had anyone else complain. Overall I am very pleased with the product. Will give an update after the season is over. Right now, I will plan to use this again if that nasty mustard algae props up its ugly head again next year.

I have used this product for 11 years. One bottle when I open the pool in the spring, one when I cover it up for winter. Easy application, you just pour it in around the pool plus in front of the jet and run the pump for a couple of hours. I have never had an algae problem. It is nice when a product does what is advertised, is consistent, and the price has remained relatively steady for years. I have recommended this product to several new pool users.

If you have black algae, this Copper based algaecide really helps - but it will not totally 100% eradicate the black algae by itself. After adding several quarts of copper algaecide and many pounds of the Chlorox shock w/ copper, I still had black algae on the floor of my pool - even though the water was perfectly crystal clear - in fact, this year my water is the clearest it has ever been! I found the solution to the black algae quite by accident. I bought a couple boxes of Trichlor shock. Trichlor has stabilizer in it so it dissolves much slower than Dichlor shock (and most "shock" is dichlor). The Trichlor is a bit cheaper - so I bought several boxes and figured it's give it a shot. WOW!! Instead of dissolving immediately, it falls to the bottom of the pool and just sits there....right on top of the black algae...and by the next day, the black algae is totally gone! I immediately started sprinkling the Trichlor shock on other areas of the floor where the black algae was growing -- and sure enough, bam! The next day it was gone. So in my experience, to get rid of black algae you need two things - Copper algaecide and Trichlor shock. Use the copper algaecide as directed on the bottle, and just be prepared to dump pound after pound of Trichlor shock evenly over the areas of black algae. You might need several treatments of the Trichlor, but believe me -- it does work.

This is really good!

Product is very effective against algae.

The product itself is good. It kills algae plus stops return. Most similar products only control start up. They won't kill existing algae. I Have ordered SeaKlear twice this season thru Amazon. Each time the lid was loose and was leaking product inside of package and on other products inside. I clicked the "how was your delivery" box as not good. Page disappears and no more follow up. I order a lot of products from Amazon, but am becoming unhappy about this and other things. AMAZON needs to up their quality for delivery and for 3rd party partners. P.S. my wife was very unhappy about blue stains on her floor! Be careful.

This product works great to make the pool crystal clear.