A problem every year, but this year it's brutal. Strictly BBB treatment and I make progress, but a green haze stays in the deep end and the typical patches show up every day in shallow end floor and stairs. Brush several times a day every day and maintain a 1ppm max loss of FC each morning. My latest readings this morning from treatment last night are:

FC-15
CC-1
PH-8.0
TA-140
CYA-40

Pool is 10 yrs old (though a put 20yrs in the chart by mistake). Could my filter by an issue after all of this chemical effort? I just had the laterals replaced but I'm still suspicious of it. Algae just seems to blow back in.

Anyway, thanks for your help! This forum has taught me so much and provides hope during the battle!