Thanks Mike22cha. This tank is really coming into its own now, 2 years in September. I added some more rock today, the obvious white ones, got off of a neighbor breaking down a tank. His tank looked so bad that I didn't want to chance putting any weird things into mine, so I bleached it for 3 days, than soaked it in dechlorinator for 2 days. Still wasn't sure if all the bleach was out, so put in my quarantine tank with 2 snails from the main tank. Long story short the "canaries" lived through the night, so added the rock to the tank.