Replastered my 26000 gallon pool in 2005. Beginning this year, I am finding sand like material the same color as the plaster. Pool chemistry is on target....CH 200, FAC 5, TAC 5, CYA 30, TA 90, ph 7.6, no metals, TDS 1000, Phosphates 50. Water is crystal clear.
Is this normal for a plaster...