Hey guys,
Our pool is vinyl, the sand is 3 years old (same age as the pool).
The pool was shocked on Thursday (liquid chlorine) by the pool installer, he also replaced the Hayward auto-chlorinator (apparently the original one wasn't putting out the proper amounts of chlorine/stabilizer). We then let the pump run 24hrs until this morning when we took a water sample into the local pool store, we also mentioned that after shocking the pool the water was very cloudy (more so) and the filters were trapping a blue slime like substance. The results are Free Chlorine - 6.4 ... Total Chlorine - 6.53 ... pH - 7.8 ... Calcium Hardness - 226 ... Total Alkalinity - 98 ... Phosphates - 0. Aside from the pH being slightly high, they suggested we floc the pool because of the blue slime (algae?). So we ran the filter today on recirculate after floc'ing it and in the morning I'll manually vacuum to waste before adding some pH down chemical.
We did have the filter opened up and inspected, all apparently looked alright. Sorry if I missed any necessary info (I wasn't around to see exactly what the chlorine shock was).
One of the neighbours had a similar issue, used a product called Klear Sok that solved it for them.
Thanks again
Shawn Oakley