Quote Originally Posted by grammy57 View Post
What did I do wrong? What do I do now?
It's hard to say: there's a reason we call the "guess-strips", but:

1. Stop messing with the alkalinity -- it's just not an issue on a small AG pool. Fix the pH -- but forget about the alkalinity.

2. If your pool has (or had) slippery sides, you had algae. More chlorine is needed - and maybe, more chlorine, more consistently.

3. If you did NOT have slippery sides, during or just before 'the green' -- I don't know what the problem is. Iron can turn pool water green, but I've never known that to happen when the pH was high (ie, > 7.6).

4. The problem may be the "bagged shock" -- these days, "bagged shock" can contain almost anything, including many chemicals that you do NOT want in the pool. Was it a single ingredient shock, or a 'multi' shock?