Dirt Diggler
Aquarium Advice Freak
I'm about to upgrade out of my 45 gallon to a 150 gallon and I have some questions about the pH buffering of the different substrates. I've heard that puka shells, aragonite, and crushed coral all raise the pH, harden the water, and buffer against pH changes. Is one better than the others in doing this? What is the general consensus when it comes to these substrates? Right now I using normal gravel, and adding Cichlid Buffer after water changes to raise the pH, and buffer. I'm stocking Lake Malawis in this tank.