Good morning, John,

I have never used polyquat so I have nothing to offer other than I'll bet the dosage is on the bottle. Others may know.

John, I personally have never needed polyquat but Pooldoc indicates it does no harm, is probably a very good preventative, and may be helpful as a cure.

I like your pH and Alk numbers. Don't overworry if they drift around somewhat.....that's maybe as much due to the testing vagaries as anything else. Just keep them around where they are.

You are wise to restrict your neighbor to bleach. You are doing everything well (very accurate additions of your chemicals) and I believe you will see continuing improvement in your pool if you continue the regimen.

I'm not sure the lower pH helped the Cl....I've read that but don't know. The results are what matters and I got a feeling you are gonna' get good results