I'm upgrading from a 65 to 90 gal tank. Unfortunately I had a snail that die under the structure and spoiled some of the substrate and rock. So I'm needing some LR.
Well the black seemed to radiate from where I found the empty shell. It was all in the surrounding rock. Not that I had much. Thought I could just break away the spoiled portions and save saved what was left. Unfortunately not... At least my house doesn't smell like rotting eggs anymore.