Hi raddish ,
THe idea of clarifiers is they are supposed to coagulate the fine particals in the pool so the stuff easily settles out to be vacuumed.
With a sand filter , I think you might be better off getting ahold of some DE powder to put in . Everyone around says to put just enough to increase pressure 1 pound.
Since you already have it , should you use it ? Your call really. It wont hurt and it could help some . But I would still look at the DE for the longterm solution
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