i appreciate the info. i knew that 2 inches wasn't enough..i don't know where they go that from. but i've noticed several things they have on this site that i don't agree with at all. unless they have just changed it in about the last 3 hours or so, when you go look up this fish, that's what it says. i may eventually add more sand...it's just such a pain to take all the rock out and i don't want to stress out the critters i already have anymore than i have to.