new to pool stuff

[Red Gate Zoo]

I'm trying to get control of a swampy pool (Dallas, TX area). Concrete, 34,000 gal. Running DE filter 24/7, backwashing 3x/day. Running Polaris 3900 10-12 cycles/day, cleaning out green goo each time. (It used to get plugged at 15 min. Now going 1 hr.) Adding between 3-6 gal. bleach nightly. Water is now fairly clear, can see the bottom in the shallow end, but still lots of green debris settled on bottom. I've been testing with Taylor2004B. Results have been in the following ranges: FC=1.5-5, TC=2-5, pH=8, cannot get CYA test to work. I received my Taylor K1515 kit today. At 5 pm, I used 25mL sample. It took 17 dippers of powder to get it to turn slightly pink, 1 drop of R-1871 to clear (.2ppm FC?), added 5 drops #3 reagent to turn slightly pink again, 2 drops R-0871 to clear (.4ppm CC?). What do you recommend? Do I need to add muriatic acid? I'm still confused by the testing numbers & what they tell me to do.

EDIT by Watermom:
Red -- I merged this new thread that you started this evening with your other thread where we have been helping you. It is better to keep everything all in one place instead of having two separate threads going.