It's up and running. My tank pH has me a little baffled though.

After calibrating the pH controller, the tank pH was at 8.0 about 3 hours into the lighting cycle (5 if you include the actinics). Alk. was 8.6 dkh. I buffered up my Alk. to 10.6 and the pH went to 8.1 and held there till about 1 hour after the MH's went off (actinics still on).

Right now the reactor effluent is 40 DPM with 10 BPM. pH of the effluent is 6.8 and Alk. of the effluent is 18.6 dkh. Going to run it like that over night and adjust tomorrow.