With in the next couple weeks i am going to be transferring my 30 to a 55 gal tank. I am not going to be traveling a long distance or anything like that. I will just be draining the water from one tank taking the LR out and then putting it all back in the 55. My question is can i just re-use my sand. My tank had been running for 7 months and has been a FOWLR tank only and thats all i plan to do with the 55. I have a clown fish a a yellow tail damsel plsu 2 turbo's and 3 nas. snails. I had a goby and a dwarf angel but a high temp jump killed them. But that is all that has been in the tank. all test have been 0's since it cycled. I plan putting the fish in my 10 gal for a couple days just to be sure the tank is ok but i plan on buying more LR and sand. Any suggestions and advice is appreciated.