When I was tearing my 40 gallon down to rebuild a few months back, I drained all the water out, and started to remove the sand.
As I scooped out sand, the scoop revealed layers in the sand at different depths. In some areas, as I was scooping, the sand was jet black and STANK something awful.
The 40 gallon had only been up and running for three months. It had 10 lbs of sand mixed with 5 lbs of live sand and 45 lbs of LR
What could have caused these black, stinky layers in my sand?
Do you HAVE to have Live Sand in an aquarium? I am thinking of doing a tank with tiny, tiny gravel and base rock, and then just get corals and fish (no hermits, snails, or stars). Would this work?