I want to set up a new temporary frag tank in a 20 gallon tank. I have a filter that I ran in the sump of my DT for about 2 weeks just to get some bacteria from the tank into the filter bads and wheel. If I throw that filter onto the 20, and do a water change in my DT, tossing the old water into the 20, the frags should do fine in there right? Of course I am putting an LED light and a powerhead on the tank also so that they have light and water movement.

