Wow, I'm glad you're here, and know better than to keep making that pool store richer without getting a clear pool!!

You were absolutely right not to add the copper algaecide, and that all the trichlor is probably the source of your high CYA. However, depending on what SWCG you have, this is one of the situations where having a high CYA is actually a good thing!

In a pool your size, using 6% bleach, you can raise your Cl to 20 ppm by adding 8.5 gallons. With a CYA that high, you need to shoot for between 20-25 ppm and consistently keep it there until the pool clears up and you're no longer losing any chlorine when you test at night after the sun is down and again in the morning before the sun hits the pool. The key here is consistency, so you'll need to test and add more bleach each time to get back up to the 20-25 range. Each 1/2 gallon will raise your Cl by approximately 1 ppm, so you can use that as a guide when retesting. Brush the pool daily, keep the pump/filter running 24/7 and backwash the filter as your pressure indicates. I would not use any more dichlor shock--I would just use bleach to get the pool cleared up, and then the SWCG should be able to take it from there.

Your pH is a little high, you might want to lower it using muriatic acid to 7.2-7.4. Keep in mind that while your chlorine is at shock level, though, the pH probably will give falsely high test results, so you might want to adjust that first.

I would absolutely not put any more of the Swamp Treat (especially since there's no listed ingredient ) or anything else in the pool other than acid and lots and lots of bleach.

We're really good at hand-holding around here, so shock the pool and keep us updated on how it's going!

Janet