I have a 90 gallon tank with discus, curviceps, cardinals, rummy nose, and cory cats. New fish often don't make it in the tank for even 24 hours.
The pH is very low, even for the above fish. It's right around 5. I tested the kH
and it appears to be very low as well.
I want to add baking soda to the tank when I do the next water change but am not sure how much I can safely add without drastically affecting the pH or kH
I saw a discussion here as to the benefits of baking soda versus coral chips.