We completed construction of our in-ground pool in May 2019. We started out with liquid chlorine and switched to the SWG this past April. I have been struggling to raise the CYA. It had been at 30 up until 2 weeks ago when I noticed a spread of black algae in my pool. We have been brushing 2-3 time a day and kept the pump and SWG running 24 hours. We tried adding Algaecide 3 days ago for black algae but all it did was make the water cloudy. I was recommended to add Chlor 90 or scrub with the chlorine tablet. Any suggestions?
FC 3.5
PH 7.6
TA 80
CH 300
CYA 60
FC 3.5
PH 7.6
TA 80
CH 300
CYA 60