And you still could have a mini cycle on the old tank....running extra filters on a tank does not get you more bacteria. It will spread the bacteria you have over a larger area, but it is still only enough to handle the load in that tank. When you move one of the filters, your level in that tank goes doen and the filter on the new tank only has some small amount of bacteria.
It helps in establishing the new tank, but both tanks will bear monitoring.
It helps in establishing the new tank, but both tanks will bear monitoring.