polyquat question

I bought some polyquat earlier this year. I use the BBB method exclusively and have great success. I run my CYA around 70-80 as I use less FC daily.
My question is I would like to use the polyquat as a second defense.

Here are my postings
FC 11
TC 11
PH 7.2-7.4
ALK 90
CYA 70-80

How much poly should I use? And what intervals should I use? I see sign of algae every once in a while when there is low use( no one stirring up the pool) or we go away for a few days. Brushing takes care of that but,,

How much should I use for 22,000 gallon IG vinyl pool and how much will it drop my FC so and how long does it take to drop the FC

Thanks in advance...Mike

I use polyquat and it works great the couple of times I have had algae blooms - due to my neglect.

I have a 27,000 gal pool and the maintenance dose is 6 oz per week.

I think I started with a full quart the first time. Truly it kills algae without any apparent side effects that I have noticed. I did not notice any change in chlorine consumption.

I am not sure that the maintenance dose is necessary. I have found consistent chlorination (adding bleach religiously) to the be the best defense.