I don't know about the last--or the first.

PolyQuat should NOT be used when fighting algae. By then it's too late and you must maintain consistently high shock levels of chlorine to do the job.

Since the only algaecide I use is PolyQuat, I never have had a foaming issue.

I know it sounds crazy to say this, but the simpler you go with your pool chemistry, ie, B-B-B, and the more relentless you are about REGULAR (daily) testing of your water's chlorine and pH levels, the less trouble you'll have. It's easy. It's quick. It's cheap. It works. Why go any other route?

Because I am consistent in my testing, I spend very little time on taking care of my water. I'm aware of, and ahead of potential problems and have compensated before hand.

I believe in the methods espoused here because I have been using them for 6 years and they work flawlessly. I have had one MINOR algae bloom and that was cleared up in 24 hours--and due to my breaking my own rules. I have not had cloudy water, or any other major problems. But I did have problems before that, when I was using the pool store and "How to Tame the Pool Monster" for advice and hadn't found PoolSolutions.com or Poolforum.com/pf2.