Tinafina
Aquarium Advice Activist
I'm going to Thailand and I was wondering if I picked up a bunch of sea shells on the beach, clean and rinsing very well, would that cause any issues in my tank?
toddnbecka said:Depends on your water chemistry. Shells are calcium carbonate, same thing as coral, and may raise the pH and hardness of your water unless they're high to start with.