In a few hours I'm going to the local fish store to trade in some guppies for store credit. I am getting a 55 or a 75 on sunday, and I was wondering, while I'm at the LFS, should I pick up a convict and maybe a firemouth to put in my 20g to grow out until the 55/75 is cycled? I normally would, but the only problem is that I am moving my 20g up to my 3rd floor, and I was wondering, If I empty all of the water and move it, (But using the same filter, gravel, plants, etc)... will I have to cycle again?