JohnsonFL01 Posted March 19, 2015 Report Share Posted March 19, 2015 I have a Florida pool with a few spots of black algae. I have tried to shock the pool and use an algaecide but I can get it removed. I'd like to avoid draining pool so I would appreciate any advice on the topic. thanks Quote Link to comment Share on other sites More sharing options...
chem geek Posted March 21, 2015 Report Share Posted March 21, 2015 See Black Algae. You need to elevate the FC/CYA ratio which, if your CYA is high, means partial drain/refill to dilute the water to lower the CYA. You also need to brush the pool and if it's plaster use a stronger brush to break off the heads and get the roots exposed to elevated chlorine levels. For just a few spots of algae, a Trichlor puck on top of it will help (after brushing) but be careful since that can leave a mark and for sure you don't do that with a vinyl liner. Quote Link to comment Share on other sites More sharing options...
JohnsonFL01 Posted March 30, 2015 Author Report Share Posted March 30, 2015 It worked perfectly. Thanks for the great advice. This forum is great Quote Link to comment Share on other sites More sharing options...
ronnyaderson Posted June 1, 2015 Report Share Posted June 1, 2015 Black algae is the most difficult to deal with. It is not infectious, but if you will not care, then it gives you some negative consequences like water turns cloudy or green, It also smells bad. This problem could be sorted out if you will Sanitize the Pool Water regularly, giving it a shock treatment by adding more chlorine, using a high quality pool filter, replace filter cartridge when needs. Quote Link to comment Share on other sites More sharing options...
ronnyaderson Posted December 17, 2015 Report Share Posted December 17, 2015 Quite unpleasant to look at the algae affected pool. I read somewhere black algae are the most difficult to deal with. But as we know that each problem has a solution. Quote Link to comment Share on other sites More sharing options...
CharlotteEhle Posted May 16, 2016 Report Share Posted May 16, 2016 Risk of algae rises with the rise in temperature so make sure you keep pool cool in summers otherwise even if you deal with algae once and get rid of it, That is a temporary solution and you might need to attend the problem very soon. Quote Link to comment Share on other sites More sharing options...
savanah Posted January 17, 2017 Report Share Posted January 17, 2017 Hi Johnson, I think preventing bacteria at the early stage is better than destroying it after it has formed to algae. It is, of course, unpleasant to watch an algae affected pool in your backyard. I just saw this informative blog which could really help pooI beginners. http://www.soldapools.com/blog/swimming-pool-tips/remove-black-algae-pool/ I also have a pool and I took the following 3 measures to keep my pool free of black algae. Scrub with a steel bristle brush Shock with granular chlorine Add some metallic algaecide. Hope this could help you. Quote Link to comment Share on other sites More sharing options...
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