Hi there, we are working on opening our pool and seem to be struggling.

We have an aboveground, round pool 12,000 gallons.
My water is a green/brown color & you can't see the bottom

We've been scrubbing the sides, skimming and vacuuming.

We got the K-2006 testing kit and here were my results today:

FC 8ppm
CC 1ppm
ph 7.0
TA (Calcium Carbonate) 0ppm
Calcium 70ppm
CYA 90ppm (just added CYA 2 days ago. It was at 0 and I added 3lbs CYA)

We have a sand filter - it is appropriately sized for the pool, but might need new sand. We have a salt water generator for once we get the water clean.

I added 1 cup of borax after testing the water to raise the ph.

What else should I be doing?