So my pool turned green ...
We got a new house with a pool but took a while to move in and could only do semi regular upkeep and it was not enough. So now I am doing the slam and have some questions.
1. With a plaster pool, is there any danger in going above the slam level? I've seen warnings about the vinyl liners but not so much in plaster. I was wondering because I don't know exactly the capacity of my pool and would like to be sure I am not under slam level, but I also don't want to get into a dangerous regime.
2. Does it make sense to slam in recirculating mode? I am pretty sure I need to clean my filters but I am still learning about that and would like to start the slam anyway.
I am sure I have more questions but those 2 are the most pressing at the moment.
One more thing. I tested my cya a few weeks ago and it was 90. Today I tested again and it was 30. I thought that could not happen without draining ... Any ideas what could have happened (besides my own incompetence in testing)?