I have a 4 ft deep 24 ft diameter above ground vinyl pool. I opened to clear water and immediately poured a jug of bleach to shock. the next day my numbers were 10 FC, < 0.5 CC, < 7.0 pH, and 0? TA. I don't have the reagents for the CYA test right now. I was confused by the TA test as the water turned red immediately instead of green. I noticed corrosion on the screws which confirmed the low pH reading (bright yellow on the test). I have added about 425 oz. of borax and still haven't left the yellow. I've added over 20 drops of base demand to get the test color to change to a red. After adding the borax, I'm now registering 20 TA. Is there anything else I should be doing besides just adding more borax?
Thanks in advance.