Rob P
Member
- Joined
- 13 Oct 2013
- Messages
- 785
Right, i'll be setting up a new tank in a couple of months and most likely going with some form of all in one planting substrate, one that will most likely lower PH/KH (as most seem to). I want to understand some more.
So my head is around the PH drop associated with CO2 injection. I have tap of approx 7.3 and this drops to 6.3 during injection. KH from liquid tests is around 5.6. I do 2 or 3 50% water changes each week (with PH 7.3 tap water). I haven't killed anything yet!
If I go and get a substrate that lowers PH/KH:
a) what effect does this lowered PH tank have on the CO2 injection drop, would I still be looking for a 1 point drop from whatever it is in the tank before injection? Some substrates say they lower PH to 6.5 or so, so I can't imagine driving this down by another point with CO2!
b) what effect of doing 50% tap water changes with PH 7.3 water from the tap?
In my head it seems there will be many large PH (possibly KH) swings, will this not affect fauna? I want to try and understand a little more
Ta,
Rob
So my head is around the PH drop associated with CO2 injection. I have tap of approx 7.3 and this drops to 6.3 during injection. KH from liquid tests is around 5.6. I do 2 or 3 50% water changes each week (with PH 7.3 tap water). I haven't killed anything yet!
If I go and get a substrate that lowers PH/KH:
a) what effect does this lowered PH tank have on the CO2 injection drop, would I still be looking for a 1 point drop from whatever it is in the tank before injection? Some substrates say they lower PH to 6.5 or so, so I can't imagine driving this down by another point with CO2!
b) what effect of doing 50% tap water changes with PH 7.3 water from the tap?
In my head it seems there will be many large PH (possibly KH) swings, will this not affect fauna? I want to try and understand a little more
Ta,
Rob