yeh. topfin are kinda junky. Id toss it. replace it with something a little better quality. HOB's you're best bet is going with an Emperor. unless you're adding pressurized co2. then you would want to go with a cannnister.
and yeah toss the media pads in the new filter so the bacteira can spread to the new filter .
and yeah toss the media pads in the new filter so the bacteira can spread to the new filter .