Hi Swamp Mistress, and welcome back!! I've been wondering about you......
You're doing things right so far, except that I hope you're using Polyquat algaecide and not any of the cheaper stuff. If you're using the cheap stuff, don't add any more!!
There's a possibility that you're not getting any result on the sock filter because of the sequestrant you added. Don't forget that last time you had to run the water over a chlorine source (I think it was a trichlor puck?) in order to drop the metals out on your sock filter. You can try that and see if it gets you any results.
This year, there's a new product out that we're testing--and there is some evidence that it is actually effective--it's called a Culator, and is a small packet that you put in the skimmer, and it's supposed to attract and trap the metals that are sequestered in water. I think that the sequestrant you have to use is HEDP--Pooldoc will chime in shortly, I know--but that might help you out, too. Here is a page that he wrote for someone else on the same topic.....
http://www.poolforum.com/pf2/showthr...-my-city-water
You might check and see if that helps any. Also--as long as you're still losing chlorine overnight, you need to get that chlorine up to your shock level and hold it there until the chlorine holds, to eliminate any algae that might be contributing to the green color....
I've directed lots of folks to your thread from a couple of years ago when you first found us, so that experience has helped a good number of people. Glad to see you back!
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