Brand New Filter in old tank?

bths9

New member
I just upgraded the filter system in my tank to bio-wheel from a tetra in tank filter. Will this cause my tank to start the cycling process over?
 
It can. If you still have the old filter, run it along side the new filter. Eventually the bacteria will colonize the new filter. If the tank's large enough, just run both filters at the same time permanently-generally won't hurt anything, and I always recommend running 2 filters on tanks over 30 gallons.

If for some reason you can't run both filters, then use some of the filter media from the old one in the new one. That'll help as well.

Regardless of what you do, just monitor your ammonia and nitrite levels for awhile.


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