danielt, thank you so much for the clear explanations!
Since my tetras can handle a slightly higher pH, it sounds like I can gently raise my KH - thereby preventing my pH from dropping, but raise my pH slightly instead - which will help my snails by reducing the acidity of my water.
I will try to raise the KH a tiny amount by using the cuttlebone I have, and see if I can strike a happy balance for the snails, fish, and plants.
Thank you so much for responding to my post
