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Old 01-04-2018, 09:58 PM   #1
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My canister filter will only run upside down??

Hi

I got a new canister filter (sunsun 3 stage) and it wouldn't prime. Then I tried turning it upside down. Eureka. Turned it back rightside up after a good flow had been established, and flow stops. Also tried laying it on it's side; once it gets beyond a 45 degree angle facing upside down, it stops... Any help would be awesome. Thanks
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Old 01-04-2018, 10:14 PM   #2
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is the inline pump aimed in the right direction
is the media packed to tight
is there a kink in the line
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Old 01-04-2018, 10:17 PM   #3
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right direction? this is my first canister filter, what does that mean?
media is just the floss pads that came with it and a bit of carbon
no kinks
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Old 01-04-2018, 10:57 PM   #4
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Are the hoses hooked up right? Might have them backwards. And the hoses shouldn't hang to much below the top of the canister. Is it a out of the box new? Or used?
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Old 01-04-2018, 11:22 PM   #5
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I've triple-checked the hoses via the instructions and youtube videos. And they aren't hanging below the filter; they are curled behind the tank loosely. I considered too much slack, but it's for up to 75 gallons and this is only a 55 gallon, shouldn't it have enough oomph as long as there's suction? Out of the box new
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Old 01-04-2018, 11:34 PM   #6
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There is an in and an out. You need to make sure you have the hoses hooked up right.

Once you do that you have to Prime the canister and get all the air out.

Did you fill it with water before closing it up? That makes it easier to Prime.
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Old 01-04-2018, 11:42 PM   #7
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To check the direction remove the quick connect. If you can poor water in a hole and it opens thatís the input. If it stays closed then that is the output.
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Old 01-05-2018, 12:29 AM   #8
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Ok, if direction means input on input valve and output on output, they're labeled, so I've got that right. Plus that's the direction it goes when I turn the canister upside down. It is filled with water now, because like I was saying, I ran it upside down. It does run when the canister is held upside down. I need it to run rightside up
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Old 01-05-2018, 12:51 AM   #9
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Does it leak at all when it's upside down? Sounds like there's air. You got all the o rings and gaskets on?
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Old 01-05-2018, 12:57 AM   #10
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It does leak abit upside down. Not much. Seems to come from one of the latches which I suppose would mean the main gasket all the way around? It's brand new, and all the parts are on it. Only thing left in the box is an extension for a deeper tank. Is there something I should do to the seal?
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