Prevention vs cure for pool algae: Prevention is easier, cure requires harsh chemicals or patience

Prevention beats cure because once algae blooms, you’re stuck with slow or harsh fixes. For a green pool, non-chlorine shock like potassium monopersulfate or enzyme algaecide is gentler on skin and swimsuits but slower than chlorine. If it’s a full swamp, you’ll need to brush, vacuum, and circulate constantly while it works.