Haven't been on lately pool has been good using BBB method.Having problem with algae returning after treating for it. Shocked pool last week, brushed and vaced and backwashed DE filter. It came back agian this week ,looks like mustard algae after seeing it on a post. The weather here in Ohio is getting cooler ,will be closing the pool soon.Want to make sure it is gone before closing. I use a Polyquat algaecide 60% weekly.I have been having trouble keeping the PH up,had to add lots more Borax to get it up.I brushed ,vaced and backwashed today.Also added anothe gallon of 10% chlorine.
Reading's today
chlorine 5.5
PH 7.2
TA 70
CH 150
SI -1.0
water temp 64
outside temp 54