08-11-2011, 03:25 AM
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Originally Posted by Jmalone
Hello All, I have a 20g Tank right now which has been up and running for a little over a year now, and the original filter that I had started out with just doesnt seem like its running as well as it should, it is a tetra whisper Ex series. Ive changed the media, taken it apart and cleaned it, and nothing seems to be helping with my problem.
Is the water throughput reduced or is it just not filtering as well? Have you pulled and cleaned the impeller?
Often a good coating of bio-slime crud gets in the impeller magnet chamber and slogs things down some.
IF you switch to another filter, you can transfer media from the old filter to the new one, but you said you replaced the media in this filter before w/o incident... the point being that in most established tanks, there is often enough biology throughout the tank (substrate and decor) to compensate for a filter & media change - especially cartridge filters.
For what it's worth, I'm a fan of the AquaClear filter design and I would not consider replacing one with a canister filter on a 40g tank (just my $.02). I'm running AC70's on my 60g.