moving tanks in tough. I have been successful several times. I have a method which has kept me from ever having a cycle. Sorry I didn't read this post sooner. I get really busy and don't have a lot of time. Here is my tried and true method
First, I mix up about 1.5 times the amount of new water I will need for the increase tank size (40 gallon increase in tank size, means 60 gallons of water). I drain out enough of the water to be able to place all the coral into a tub. Remove all the coral not attached to rocks or rocks easy to remove with coral attached and place in a heater and powerhead. I wait about an hour for the dust / sand / water ever to clear and all the water looks clear. I then drain out all the clear water I can until only about 4 inches of water is left in the tank, leaving the rock in and fish in. I place the water in various tubs (depending on the size of the tank. Once I have 4 inches of water left, I stop draining and remove all the snails I can see, followed by live rock, and finally fish. the water is now a murkey mess, filled with stirred up sand. I then suck out all the sand and water into a big tub and stir the hell out of it. I stir it until it is a total mess of dirty sand and water. I wait about 2 minutes and start removing all that water I can, throwing it away. that water will have concentrated dead things from the sand, which is what would cause your mini-cycle. Once all the water is almost all removed, leaving just sand. I put that sand in the bottom of the new tank and add all my stuff plus new water and you are done. :-)
-Doc