Re: PH controller vs. Drop Checker A belt and suspenders huh. That sounds pretty good to me. I actually might wait a bit because I just got done cleaning and calibrating my controller. I couldn't believe it. It was .5 off! It read 7.5 in the 7.0 calibration fluid. I probably haven't had enough CO2 for quite a while. That could also explain why I've had algae for quite a while. Right now a belt and suspenders does sound pretty nice. |