Welcome to our forum,

Going back to your original post. Sorry about the health issues. Pools are a bit like having children. The "I'm yours, feed me" syndrome kicks in.

Once pool water warms up to 50 degrees or so in the spring, you need to start to do something to keep it sanitized ( also read as clear, not green ) Not much at first, but as it warms you need to be more active and stay that way until the fall when it drops below 50 again.

I have not read all the advice you've been given between you first post and this, but keep this in mind for the spring and fall.

Good luck.