I have a 54 gallon corner tank. I am looking into getting a 70 gallon to allow more room. What would be the best way to transfer my fish, soft Corals, rock and sand to their new home. I know there are many ways but I want to be careful with what I have. I thought about transferring some of the water I pull out (say 20 gallons), adding 20 gallons of RO/DI into new tank and do this again gradually over a period of time. I do have a slight Nitrate problem so this idea may work. But most of my live rock in the 54 has some coral attached so I not sure what to do in this case. And my sand bed can't be moved right away. Unless I am safe to move it all. Ideas??