Originally Posted by Herky
I'm planning on upgrading to a 60 gallon from a 29 gallon two months from now, would it also help to put some of the water from the existing cycled tank into the new one? My LFS has a bottle of fishless cycling stuff that they swear by and I'm going to try that but with caution and testing before putting fish in, but I would like to do the best job I can to prepare the new tank for my fish.
I am not aware of any value in transferring water from an existing aquarium to a new one. The bacteria colonize objects like the tank walls, substrate, plants, wood, rocks and filter media; they do not live in the water. Moving some of the filter media, or some of the substrate, or wood or rock from the existing tank would transfer bacteria. However, they must have ammonia and nitrite to feed on or they will die off. There has to be a source of ammonia in the new tank from the start if this is to be beneficial.
As for the "fishless cycling stuff" do you know what it is? If it is pure ammonia, that will start the cycle. But if it is a biological supplement like "Cycle" or "Stress Zyme" it is bacteria that again needs food, i.e., ammonia. Cycle and Stress Zyme are very good if fish are cycling a tank.