If I take some LR out of my current 55g DT, and put it (and some new sand) in an extra 55 i have laying around would that start a cycle? Would I still have to add the cocktail shrimp? The reason I ask is b/c I am picking up a 125 next monday (which the lfs is selling for $1/gal!!) and I'd like to see if I can start a cycle so that i'd be able to put at least 110 gallons of good water into the 125. in the 55 i have running i only have 2 clowns and a cuc along w/ LR and sand and since the 125 is going where the 55 is right now, i figure if i can cycle w/ the extra tank i have, then once the cycle is over i can just do 55g DT + 55g cycle = 110g into 125g then kinda just "top off" the remaining 15g and move everything into the 125 in one move. Good idea, or rookie mistake waiting to happen?