Fluval 304 - Low Flow

snack

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Aug 6, 2003
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I have a Fluval 304 cannister filter that I am not sure is working properly. I have carbon running on the bottom layer and the middle has carbon and the bio-stuff and the top has the bio-stuff too. It seems that the flow out of the unit is failrly low. I would of expected a brisk stream but it is more like a fast trickle. I have tried cleaning the foam filter and this doesn't make a lot of difference. If I give the unit a few pumps from the primer it will speed the flow up for a day or so and then it slowly reduces the flow.
 
I had a similar problem with my 204 initially. It turned out to be air stuck in the unit. I would suggest to keep trying to prime it and turn it off and on several times. All of a sudden, mine kicked into full volume and I have not had that same problem again.

Also, the Fluval telephone support was very good with suggestions.

Bob
 
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