How to balance off O2 vs CO2?

nickmcmechan

nickmcmechan

Proudly Scottish
Feb 25, 2007
2,028
0
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54
Edinburgh, Scotland
Hi,

I have a 180l SA setup which I've ordered a pressurised CO2 kit for.

I run the tank at 32 degress C, which of course lowers dissolved O2, therefore I run air into the tank via the outlet of the powerhead. This causes a lot of surface agitation.

I experimented with turning of the air pump yesyerday and woke this morning to all the fish hanging at the surface. Immediately I put the air pump back on and the difference was instant.

So, how do I run an air pump into the tank as well as CO2 injection without gassing off too much of my CO2?
 
This is a tough one. If you have to have the temperature that high I would say #2. However, the best way would be #1. Just one opinion.
Why would you have the temp that high? Most tropical tanks can be in the 25-26C. 28 would be pushing it.
 
You might wanna do both then. CO2 accumulates more at night. I use CO2 controller with PH probe and with my temp of 25C it shuts off the CO2 an hour after lights off.
 
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