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We have bright yellow streaks appearing in our pool (we have a pool liner), as well as some brown mud looking deposits that disappear when you try touch it (see photos). Does this look like Mustard Algae? We've bought Yellow Out and done the shock method, because our CYA is really high and we...

Hi there! We are new pool owners and had a guy come out yesterday to tell us how to de-winterize. We have a sand filter (no sure of the size), Emerson pump, and a rectangular 20K gallon pool. After backwashing and rinsing, we put flocculant in the pool and left the pump on filter for 2 hours...