I was forced to use distilled water to bring down my
pH and
GH for my dwarf cichlids. My pH was around 8.0 and the owner kept his at 6.8-7.0 so I thought that was too big of a change for them. Also, my water is around 10-15 GH which is fairly high. I got the pH to come down right between 6.8-7.0 and the GH to 4GH. The distilled water also brought my KH down to about 1 or 2 KH. This means that my tank will be very very very very susceptible to pH fluctuation. A fluctuating pH is actually worse than a stable higher pH.
If I add Baking Soda to my tank to bring up the KH will the pH go back up?
I know baking soda will not affect GH but I am unsure about the pH. I have read many places that it is harmless to the fish(which are not even in the tank yet, so don't worry).