Canister filter newbie here. Help? - The Planted Tank Forum
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post #1 of 7 (permalink) Old 04-07-2018, 03:21 PM Thread Starter
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Canister filter newbie here. Help?

I'll just say right off the bat that I've been out of the aquarium hobby for almost twelve years and have never used a canister filter before, so please bear with my inexperience, lol.

I purchased a canister filter about a month ago for a 40gal tank (which has nothing living in it at the moment). It's a (lightly used) Sicce Whale 200 that's supposed to run at 190 gph. I've set up and primed it according to the manual + instructional video, but after the canister is done filling and I turn it on, the outflow is really weak.. Like, barely trickling out. The intake/out-take tubes aren't being obstructed or cut off by anything, and it's running quietly with no unusual grinding noises. It's assembled correctly. I can't seem to figure out what the issue is. Advice?

EDIT: Filter has been working perfectly for about a month now, there was a small loose piece inside that fell out while I was putting it together the first time.

Last edited by madcaps; 05-15-2018 at 08:47 PM. Reason: No longer having the issue.
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post #2 of 7 (permalink) Old 04-07-2018, 04:11 PM
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Not up on that filter but there is an almost universal item that often causes this. A major point for this type of impeller is that they can only pump water and will not move air. So when you have weak flow, it can often be that there is some water but a lot of air around the impeller. Kind of like splashing but not pumping?
Once assured there are no jams like media in the tubing etc, no kinks in tubing and the water in the tank is the correct level, I look for air in the wrong place.
Sometimes reading and using directions still leaves us at a loss!
Perhaps try this? Try tilting the canister and "rotating" it so that any air inside will go up and out the outflow tubing. I suspect there is a bit of missing detail on the starting (priming?) portion which has left just a small amount of air.
If not, there is some chance of an air leak letting air in but I'm guessing at the first and easy cure!
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post #3 of 7 (permalink) Old 04-07-2018, 05:05 PM
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try lubbing your o ring with vasolene that will give you an air tight seal also


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post #4 of 7 (permalink) Old 04-09-2018, 06:07 PM
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try lubbing your o ring with vasolene that will give you an air tight seal also
Have to piggyback on this, I'm trying to locate the o-ring but I think this is where the top is located also? The leaking spot is in this area:


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post #5 of 7 (permalink) Old 04-10-2018, 12:02 AM
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okay i see you may also want to try and seal it it with some silocone glue not sure if you can replace that part you would have to check with eheim


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post #6 of 7 (permalink) Old 04-10-2018, 12:46 AM
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Not up on that filter but there is an almost universal item that often causes this. A major point for this type of impeller is that they can only pump water and will not move air.
@PlantedRich: If there was air in/entering the impeller, wouldn't you expect to hear the typical chopping/cracking sound such as when bubbles hit it, which would be very obvious? Since the OP is getting some flow, and reporting smooth running, I would think that any air involvement would produce such sounds.

If the filter is humming quietly and smoothly, first thing I would do would be to measure gph, which can be up to half the rated gph, but certainly not what I would call a "trickle." Then, if it's at least 90-100 gph, expect that that might be as good as it gets with whatever media, tube bends, etc. might be involved.
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post #7 of 7 (permalink) Old 04-10-2018, 01:14 AM
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Originally Posted by madcaps View Post
I'll just say right off the bat that I've been out of the aquarium hobby for almost twelve years and have never used a canister filter before, so please bear with my inexperience, lol.

I purchased a canister filter about a month ago for a 40gal tank (which has nothing living in it at the moment). It's a (lightly used) Sicce Whale 200 that's supposed to run at 190 gph. I've set up and primed it according to the manual + instructional video, but after the canister is done filling and I turn it on, the outflow is really weak.. Like, barely trickling out. The intake/out-take tubes aren't being obstructed or cut off by anything, and it's running quietly with no unusual grinding noises. It's assembled correctly. I can't seem to figure out what the issue is. Advice?
Double check you don't have the intake/output hoses reversed..

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