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Old 12-28-2011, 05:14 PM   #1
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External filter problems!!!

Hi everyone, ive got a problem if you could help me ?

Its my external filters....i find it hard to get them going after cleaning and the water just ends up dribbling out of the spray bar its like they just dont have any power.

Could someone please tell what im doing wrong. Thanks
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Old 12-28-2011, 05:40 PM   #2
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Canisters? Are you priming them beforehand (filling with tank water)? Have you tried rocking it back and forth after you turn it on to release air bubbles? Have you tried cleaning your impeller?
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Old 12-28-2011, 10:07 PM   #3
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Sounds like your letting all the water pressure out. Make sure the filter is filled pretty much completely before turning on.
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Old 12-28-2011, 10:11 PM   #4
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It helps if you start a siphon before turning it on, depending on what kind of filter it is. On the eheims with the quick disconnects, it is pretty easy to get a siphon going without making a mess.
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Old 12-28-2011, 10:20 PM   #5
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Make sure the impeller and impeller cavity are clean, and the impeller is turning freely. Then, make sure the can and hoses are full.
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Old 12-29-2011, 08:39 PM   #6
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Good points. I cleaned my FX5 last time and when I started it back up, I got a bunch of crud coming out of the return back into my water. Needless to say, it's frustrating after you've cleaned everything up.

I'm thinking all of this dirt is coming from the impeller and impeller cavity. I'll be taking that apart this next time.
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Old 12-30-2011, 06:59 AM   #7
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Whenever restarting my canisters I get alot of crud that comes from algae in the hoses which is knocked free by the movement of restarting the siphon, expelling air bubbles, etc.

I find the easiest way to restart my canister is just fill it up with fresh water to the lid line, put the lid on, start her up. Any excess air that remains is easily expelled by some gentle shaking, and it's running silent in a minute or so.
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Old 12-30-2011, 08:01 AM   #8
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Doing a quick flush of your hoses helps make sure they are primed, and knocks some of the mulm loose that collects in them. I've yet to stop the 'mulm cloud', but flushing them definitely minimizes it.
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