I agree. Something that may be useful to do would be to run a sponge filter (in conjunction to your main filter) in your main tank and to move it whenever you need to quarantine. It doesn't have to be a sponge filter, your AQ can do the same thing.
“Books are my friends, my companions. They make me laugh and cry and find meaning in life.” ― Christopher Paolini, Eragon
"By books you mean fish, right?" ― Raymond