I just upgrade from a 55 to a 90 and this is what I did. 1st I set up the 90 with water and 2 bags a LS in the back of the tank to place my LR from my DT on.2nd over the course of about 2 weeks I gradually added LR from my DT (with no coral's) on it.3rd bought a 12 pack on a friday night, transfered the fish ,put the LR with coral's in, now the 55 was empty except for the sand, scooped, rinsed, and done.I Iost nothing,by that I mean my anenome didn't even move off the rock it's been on sense I bought it...oh, I set my sump up at that time as well with 2 gallon's of mud and 1 bag of crushed coral and some small LR.. and by the way is that a horse your setting next to? I mean my god I thought my akita's were big dog's ..lol