Alright I was going to take the easy path, but now I'm rethinking it. I'm turning my old axolotl tank into a new shell dweller tank. It is already cycled so I figured it would transition smoothly. Was going to go pick up fish today, but as I thought about it... the tank had previously been planted, so there is dirt under the sand cap. From my understanding, shellies like to dig... unburying a bunch of dirt. so what would be the easiest way to remove the substrate and maintain the bb/cycle? What if I unplugged the filter, then removed the top layer (crushed coral and shells that I added in hopes of getting the shellies in sooner) and then the top layer of sand, stored them in a bucket of tank water, drained the tank, scooped out the dirt, then rinsed and drained with a siphon, then add sand and small amount of tank water back in? Any ideas? This seems so complicated.