That sounds like a duh! statement but it is true. Without proper water balancing a pool can get out of hand very quickly on you. It is one thing often misunderstood in the industry. When it gets out of hand you are left with a green pool and algae. https://www.buzzsprout.com/admin/episodes/706252-episode-45-how-to-treat-a-pool-with-yellow-green-or-black-algae-and-how-to-prevent-it
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I have some black algae spots in my 1yr old, quartzscape plaster (French grey color), 20,000 gallon pool. Is it okay to use the chlorine tablet method on the exposed aggregate plaster? If so, how long should I let the white residue remain on the algae spots?
Every how often should I test each chemical in a pool? I know FFCFCFFCFC should be every week and so should phph but how about everything else? AndA