Unless the ingredient is "Poly....<something really long>..." 60% or 30%, (which we call PolyQuat) then do NOT USE the algaecide. PolyQuat is the only good one and it's better for prevention than cure.
Re: another black algea problem
Unless the ingredient is "Poly....<something really long>..." 60% or 30%, (which we call PolyQuat) then do NOT USE the algaecide. PolyQuat is the only good one and it's better for prevention than cure.
Carl
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