papa_c
Member
- Joined
- 22 Jan 2013
- Messages
- 368
A bit of background about the tank, 200l, CO2 injection, heavily planted, couple of Krebs, shoal of cardinal tetras, and oto's, water changes are from an HMA filter 50% weekly, gas on at 12.00 lights on at 4.00 till 10
My ph profile starts at 7.2 and drops over the 4 hours pre lights on to 6.8, drop checker is light green at lights on, if I increase the CO2 injection the fish suffer and all hang at the surface. This gives me the impression that CO2 saturation is quite high.
Based on this I would expect the ph to drop more than half a point. Checking the hardness of the water it is 465ppm
So is it the hardness of the water that is buffering the ph drop?
My ph profile starts at 7.2 and drops over the 4 hours pre lights on to 6.8, drop checker is light green at lights on, if I increase the CO2 injection the fish suffer and all hang at the surface. This gives me the impression that CO2 saturation is quite high.
Based on this I would expect the ph to drop more than half a point. Checking the hardness of the water it is 465ppm
So is it the hardness of the water that is buffering the ph drop?