I can't seem to raise my Ph above the low end of 7.0-7.2
Over the last 3 days I have added 1 1/2 cups of borax (1/2 cup every 24hours) and the ph has not changed. It seems stuck on this. I do have tri chlor in a "frog" chlorinator but it really does not put any appreciable chlorine in the pool possibly because I only have to run the pump 3 hours to turn over the water 2 1/2 times. I use liquid chlorine and the bleach calc
The water is and always has been crystal clear
Ph 7-7.1
FC 2 -3
CC 0
TA 100
CYA 40
CH 100

6600 gal fiberglass pool
Hayward 300sq ft cartridge filter