I have a 90 gallon tank that has been up about 2 years, I have to move it to a new location in my house, though it might be a goo chance to change out my sand, right now it is very fine and I can have much flow or it causes it to move all around, want to go to a bigger size, what I am not sure of is after the move, can I just add new sand in, or will it cause a cycle that could kill fish or corals ... not sure if it is a good idea at all or what the best way to insure safe transfer , Any help would be greatly appreciated
