Who Gives A Fish Forums

My method's simple: small changes more often. 10% every 3 days keeps the water stable, and my betta doesn't freak out. Less is more sometimes.

Shells are basically calcium carbonate, so they'll slowly dissolve and raise both pH and hardness. If you've got a buffering substrate or driftwood, it might balance out, but otherwise, I'd remove them. What's your tank stocked with?


Yep, that's been my experience too. I've got a mix of tetras ...