You had mentioned various ORP levels that inhibited algae and all of these were quite low relative to the 650 mV level for sanitation. Maybe the level of HOCl to inhibit algae is below that for sanitation and it is only after algae is established (and forms a biofilm) that chlorine is not effective (except at "shock" concentrations)??? Or perhaps the lower ORP levels reflect monochloramine and that virtually no HOCl is present.Originally Posted by waterbear
I have read that monochloramine is more effective against established algae since it reacts more slowly (weakly) than HOCl so it doesn't get "used up" by the biofilm layer and is therefore able to penetrate more deeply. If you have any way of figuring out what it takes to suppress algae and to kill algae, please let me know. We know from the experience on this forum that large amounts of chlorine will kill algae, but I'd like to quantify this further in light of our knowledge of HOCl concentration.
I've posted the technical thread in the China Shop called "Pool Water Chemistry". After I get that stable, I'll post another non-technical thread to ask for real-world algae experience.
Richard
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