carpets are sand dwellers and have the tendency to float if they do not like it.. if they manage to get a hold of the base of the tank under the sand, they can traverse too..
frequent feeding, i think half a year should be enough.. hehe..
ur RBTA crawled OVER SAND!?!?! oh man.. thats pretty cool.. now i must be wary..
u r right ketchup, maxi minis are sand dwellers like other carpets.. so they will have tendency to swim through sand.. btas supposedly shouldnt touch the sand.. but after lemon's experiences, i must keep my eyes open more.. nothing's impossible in this hobby!