New to this site and to pool ownership. Purchased a used pool and had it installed the 2nd week of July. Very clear water initially, now it is very cloudy. Have added 2lb. of stabilizer and have shocked 4 times (including today). Use a chlorine stick in skimmer basket. Have added algaecide 2x and clarifier 2x. Have ordered and have not received a TF 100 kit yet, so I am using strips. PH reading is around 7.0 and the stick shows no free chlorine or stabilizer. Is it likely that the stick is just not registering any free chlorine? Have changed and cleaned the filter 4x at this point and the pressure gauge is at its normal level.