I had a LMB and a Midas Blenny that were buddies until 1 winter day the MB went carpet surfing....must have got into a fight!! I get the whole excitment rush when setting up a new tank, but there is a reason for cycling. Pregnant women wouldn't go to their doctor at 5 months and say "I want to give birth today because I am so excited that I can't wait even though I know the baby is not quite ready yet". Do you know what kind of fish you want? Corals? Are the fish compatible? What about your clean up crew? Skimmer? Are the lights you have good enough for the corals you want to keep? $$$...A LOT to think about while cycling.