Complete the pool chart, above. Let me know when you do, and I'll post links and approximate doses for your pool.

It's very hard to buy HEDP locally; the chemical companies try to conceal ingredients. Polyquat is not quite as hard, but you still have to become an expert "label inspector". Amazon has pretty good pricing; is a reliable suppler; and allows me to specify EXACTLY what the link goes to, so you get the right thing. Plus, the PoolForum gets a small commission on each purchase.