Nic;2909751; said:that sand that deep gonna cause you more problems then you want....
I've had it for a very long time like this, no problem at all, with very "sensitive" fish. This retic started eating the 2nd day it was in the tank, and that was after rearranging and stirring everything up for more space for him. Between the spiney eels, chaca chaca catfish, MTS's and plants, there is enough movement. I think for the most part it is a rumor though, who has seen fish become ill from too deep of sand personally? I know anaerobic conditions do occur with very deep layers, i've made a Winogradsky column haha. Id seriously be more worried about the driftwood or plant decay in this tank.