The amount of chemicals and aggravation the Taylor K-2006 saves you in one season easily pays for it. Polyquat's good stuff, but what it WILL do is lower your chlorine level. Adding 1/4 bottle will send your FC level to 0 within 48 hours, but don't panic! It's OK. It also helps clear out fine particles that otherwise pass through the filter.

But the more stuff you throw in the harder it is to help you clear it up. Now you have copper in there on top of the iron, and whatever the "green to blue stuff" is. And unless your metal removers are all HEDP, regardless of brand, who knows what will work? It's not the brand that matters, it's what in it.

Frankly, it doesn't look to me like you are paying attention to Ben's advice, just buying stuff by brand rather than ingredients and throwing it in. Your best hope to keep it swimmable is keep the chlorine up and the pH in 7.2-7.9 so it's sanitary, even if ugly.

Carl