So I've purchased my first Discus recently, and want to make sure what I'm doing is correct before I send them to the slaughterhouse. I currently have a group of 2-3 inch Discus in a 20 gallon tank, with a Aquaclear 70. The filter has been cycled for over a year, never without fish since. I added in a second sponge to the filter a few months ago, maximizing filtration capacity. If I were to remove that extra sponge from the filter, toss it in my canister filter that'll be on my brand new display tank, will that be enough BB to keep things stable? Should I wait a few weeks with an Ammonia source? What would be the best course of action in this situation if this wouldn't work out? Thanks!