I live in Syracuse NY and almost every year I open the my in ground L shaped pool it is a green mess. This year I decided to check it early before the mess starts. I checked it today here are my numbers.

FC 0
CC 0
TC 0
PH 7.4
Alk 40
CYA less than 20.

When I closed the pool the CYA was 40 and chlorine was at shock levels. The pool is still clear right now and I am wondering what to do next. My thought is to bring the CYA up then bring the chlorine levels up to shock levels. I have a small submersible pump that I could drop in to circulate the water because I don't want to open it yet.