Sublimer
Aquarium Advice Apprentice
Hi all. I've been cycling my tank for what seems like a month now and before I get my crabs this week I wanted to make sure there was nothing in the water that could harm them. I've added salt to make the water low end brackish for acclimation purposes, I've dosed the it with calcium, and the ph level is where it should be. But I've heard that copper traces are harmful to inverts and I was wondering whether there was a foolproof way of testing for it