Guiadance & Direction for usage of a Co2 system
So I have finally set up a diy citric acid system. It works well. I am not aiming for a high bps (~1.5bps), and with the diffuser I have and where it is placed, no bubbles even hit the surface at that rate.
What I am actually concerned about is, overall effects on the water column. I am letting it run 8-10 hours a day, kicking it on a few hours before the light comes on, off about an hour before toning the light down. Light is a satellite plus pro, 36gal tank with about 28gal volume, ~20" from surface to sub with light about an inch above surface. While I am obviously concerned about the plants otherwise I wouldn't be doing this, if push came to shove, I would be more concerned about the fish than the plants.
My real question is, is there an ideal kH for this type of situation? pH will obviously swing, is that safe for the fish? Currently, kH is 2-2.5, pH is around 6.4 during the day, 6.8-6.9 after lights out and Co2 is off. would I be better off with a higher kH leaving it on 24/7?