Hello!
I have a 20 gallon with a male Betta, 6 rummy-nose Tetras, and a Nerite snail.
I check my water regularly, and everything is fine, save for the hardness. My GH is weirdly low at 1.5 dGH, while my KH is very high at 15 dKH.
I use API Proper pH 7.0 as a pH buffer, which claims to cause...