12-07-2008, 07:53 PM
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The quickest way to safely get into a new larger aquarium is to set it up and fill it with dechlorinated water. Once everything is running and the temperature matches the tank you already have, move the fish and the filter from your old tank to the new one. That way you will have a mature filter on the new tank that has enough bacteria in it to deal with the fish load in it. After all it has been dealing with those fish for a while already. Once the two filters have run together on the new tank for a month or more, the new filter on the large tank will be mature enough to take care of the tank by itself. After that just stock slowly and you never need to go through a difficult cycle again.
If you left the small filter running on the big tank all the time, it would give you one to use if you ever want to set the 10 gallon up again because it would stay cycled.
Last edited by Oldman47; 12-07-2008 at 07:57 PM..