Hi everyone. First time poster here. Have an in ground pool, 18,000 gallons. Chlorine with the Sta-rite dome style cartridge filters. I've been battling algae all summer. levels come back normal with the test kit (T-100 I think). pH will come back a little high sometimes. I've done the whole shock, brush, clean filters, run pump, clean filters again process several times and it clears up, but it seems like if I don't keep my chlorine really high, this algae keeps returning. Also potentially worth noting that we have solar heater and keep the pool as best we can at a refreshing 90+ degrees (happy wife, am I right?! 
). Any advice would be greatly appreciated. Thank you!
). Any advice would be greatly appreciated. Thank you!
