Are you moving the fish from the 10 gal
to the new tank or is this a second tank? If you're moving everything over, just move all the media from the 10 to the new filter; it'll help cycle it but it won't instantly cycle it for a full load of fish as the media in the 10 will only support the current load of fish in the 10 gal
, but it will help.
If you're keeping the 10, add a small portion of the media from the 10 to the new filter; you don't want to remove too much or it'll throw the 10 gal
into a mini-cycle (keep testing the 10 gal
daily when you remove media in case there's a temporary toxin spike). Again it'll help seed it, but not fully cycle it for a full load of fish. From here you can either do a fishless cycle on the new tank, or do a fish in cycle starting with a couple of fish, depending on size.