First time pool owner. It's an above ground polygroup Summer's wave 18X4. Shocked it last weekend and the levels are unbalanced. And there is stuff in the bottom. I have vacuumed it and cleaned the filter. The stuff is back. I don't know if is algae or just dirt.
Total hardness 0
Total chlorine 10+
Free chlorine 10+
Total alkalinity 0
My question is what do I need to do to make it safe to swim in?