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  1. K

    Can this be mustard algae?

    Seeing what appears to be a yellowish buildup on the side walls of my pool. Not sure what it can be...hoping it is not mustard algae. I had something similar a few days before I closed my pool last September but I vacuumed it up and closed the pool. Opened the pool early May and have had no...
  2. K

    Interesting residue on pool stairs...

    I am somewhat new to pool ownership... Last year was my first year with the pool and had help from a neighbor who has his own pool learning the ins and outs...and of course learned a lot reading TFP! So last year the fiberglass pool stairs (2 sets) were a yellowish color. Neighbor said it just...