Maybe I'm overanxious but I have a hard time waiting to see if the fish are gasping for air at the surface, so I'm constantly measuring ph and calculating co2 to avoid this situation. Maybe I just need to do the airstone on a timer at night. High co2 doesn't seem to bother the fish in the day. I've had measurements as high as 54ppm with no effect. Of course at that point I disconnect the co2. I'm almost ready to just cut the lights back and not do the co2 or just do low levels.
On the other hand maybe I just need a valium (grin).
Bill |