Clorox Pool&Spa XtraBlue+ Algaecide Form Pool Algae Chemical Controllers for Treating Algae, 40 oz

The best! Can't go wrong! Used this since it came out. This year I waited too long with the heat algae has been a big issue. I have droids, they are having trouble keeping up! I finally got this and algae is gone. Above ground 21 round and 5 ft. Deep.

Unfortunately, I got a rather late start to opening the pool this year due to unforeseen circumstances. With this heat, the algae has been proliferating faster than the chlorine can take care of it. I added the Clorox pool and spa extra blue and algicide and I am telling you in 24 hours, that algae has been reduced to 95%. The rest will have to be vacuumed. Very impressed with this product. Definitely worth the value.

Kills algae and prevents new growth. Pour in slow or in front of one of the running jets so the blue color from the product doesn't cause discoloration on your pool walls/floor.

This stuff works. Probably not the best for your pool as it contains copper, but copper is the easiest way to kill algae.

cleared the algae that was forming in the pool super quick. After running the filter overnight the pool was crystal clear.

I have mustard algae and used it last year but didn't follow the directions so it came back. this year, I followed the directions and repeated in 72 hours. the pool is crystal clear. no sign of algae.

It didn't get rid of the algae,I follow the directions, But it didn't get rid of the black algae. Still need help.

The small bit of algae died but this left a stain in the bottom of our small pool. It is a 14ft across pool we take down each year and it's been nice and blue for 3 years but now it has brown stains scattered across the bottom. I couldn't get the usual algaecide I use because of the time of year so I tried this. I regret it.

Fine another brand Clorox pool items are just to keep u buying kore and kore products it's a never ending cycle wasted over $300 and still ended up draining the pool

Didn't change the pool at all