I have soft water at neutral pH, but I'm planning to start a 10G African cichlid tank (shell-dwellers). Trying to decide what the best way to bring up hardness and pH to the proper range, and I could use some advice. I've never messed with these before.
Limestone raises pH and hardness, yes? I have some nice limestone fossil rocks that would look neat in the aquarium.
And I'll have shells in the tank, of course, for the shell-dwellers. That'll up the hardness a bit.
How much is too much? I don't want to accidently raise pH and hardness too high.
And are water changes going to be a problem? The new water won't have the same levels as the tank water. Could that harm the fish?