I'm upgrading the biocube to a 45 with sump. I have decided against reusing the sand (after a lot of reading seams safer to use new). I have about 4 corals in the tank that can be rehomed into my 75. If I get some of the "live sand" in a bag and reuse my rock and water do you think it would be possible to avoid a ammonia spike. I can't put the fish in my big tank (clowns wouldn't get along, and neither would the Blenny). Will 20-30 lbs of live rock be enough bio filter? Any tips or tricks?