Join Date: Aug 2012
Location: North Carolina, USA
Mine is a bit faster than that in my 120g, but I'm pushing CO2 pretty hard. I pulled my drop checker out early on because I was finding that I was pushing into the yellow anyway. I go by total pH drop during the day now. I get about 1.2 pH drop through the day while the CO2 is on. When I go to 1.3-1.4 drop, I start to see signs of fish stress.