Join Date: Mar 2010
Location: Northwest Florida
Confused about CO2 and fish health
I'm about to make the DIY CO2 diffuser outlined in this thread:
However, I am unclear if this will be safe for the fish. I've heard that the reason fish problems occurs is because the pH swing caused by the CO2 diffusion is too much stress for the fish, and I have also read that it's not the pH shift but just the mere fact that the fish cannot get O2 because of the sheer amount of CO2 in the water. Which one is true? Are they both a possible problem?
Also, would having an air stone hooked up to an air pump come on at night be a good solution to this problem? Right at the moment, my 55 gallon is being fed CO2 by a DIY yeast bottle (1L Gatorade bottle--1 cup sugar, 1/4 tsp yeast). I have the tubing going to the intake of the HOB filter.
The fish are still the most important part of my tank, even though I am really enjoying growing plants in the tank as well. It's more important that the fish live than having thriving plants.
Thanks for any advice.