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Old 11-08-2011, 07:18 AM   #1 (permalink)
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Default Priming My Eheim Pro 3

Can someone provide advice as to why I can't prime my Eheim Pro 3 in the tank I'm trying to set up? When I push the prime button once or twice, I get a little flow down the intake tube, but that's it. Would excess sediment from the substrate affect priming (I rinsed it, but there's still a lot of sediment in the tank). Could it be there's too much slack in the tubing? The water level is within 3 inches from the top of the aquarium, so I don't think that's it. Anybody have any suggestions? It's not like I can take the setup back to the LFS to have them look at it. It's very frustrating.
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Old 11-08-2011, 02:33 PM   #2 (permalink)
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Default Re: Priming My Eheim Pro 3

You have to press that button in repeatedly. doesn't have to be super fast, but keep pushing it down over and over again. sometimes mine takes 10+ pushes. Once the water begins to go down towards filter, don't let up! Once you see and hear the water fully going into the filter at full force you can stop. I own two of them and they can be tricky at first.
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Old 11-08-2011, 02:49 PM   #3 (permalink)
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What you can also do is pre-fill the canister with water so that the impeller inside is semi submersed... Once you plug and run the filter, you then now push the priming button a couple of times to aid pushing out the air/water and establish a running flow... This method works for me as I have my 2075 hooked up to bulkheads (drilled bottom tank)... Hope this helps...


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Old 11-08-2011, 06:44 PM   #4 (permalink)
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Default Re: Priming My Eheim Pro 3

I have 2 x 2075 and 3 x 2028 atm and here is my personal experience:
  • Filter has to be empty as per Eheim rep (instructions are not clear, especially for 2028 ), plug in the quick disconnect with the flow lever all the way (to the left (max) on 2075 or forward on 2028 ) and you should see/hear the filter starting to fill with water. Once the filling noise subsides, plug the filter into power. After about 1 year of use, I might have used the priming button on 2075 once. (and gazillion times on 2028 )
  • Filter's base (bottom) should be at least 12" below the tank's base
  • Make sure that both intake and outflow are completely covered with about 1" of water (if spray bar is installed vertically, the top outflow hole must be covered). Removing the end-cap from the spray bar before filling helps a lot also.

Hope this helps. GL.
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Old 11-09-2011, 02:27 PM   #5 (permalink)
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Angry Re: Priming My Eheim Pro 3

Quote:
Originally Posted by OVT View Post
I have 2 x 2075 and 3 x 2028 atm and here is my personal experience:
  • Filter has to be empty as per Eheim rep (instructions are not clear, especially for 2028 ), plug in the quick disconnect with the flow lever all the way (to the left (max) on 2075 or forward on 2028 ) and you should see/hear the filter starting to fill with water. Once the filling noise subsides, plug the filter into power. After about 1 year of use, I might have used the priming button on 2075 once. (and gazillion times on 2028 )
  • Filter's base (bottom) should be at least 12" below the tank's base
  • Make sure that both intake and outflow are completely covered with about 1" of water (if spray bar is installed vertically, the top outflow hole must be covered). Removing the end-cap from the spray bar before filling helps a lot also.

Hope this helps. GL.
Well, this may explain it. The set up sheet says that the water level has to be no more than 4 inches below the top of the tank. My water is up to 3 inches below the top, but I have the outflow tube mounted horizontally and it is entirely above the water level. Could that be the problem?

Also, are you saying that plugging in the quick release with the lever in the "on" position will get the siphon going without using the priming button??

I guess I'll fill the tank higher and try again as you suggest. If your method doesn't work, I'll try filling the canister with water as per khanzer 22.
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Old 11-09-2011, 04:11 PM   #6 (permalink)
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Default Re: Priming My Eheim Pro 3

Or you can bypass the priming gizmo and just suck on one of the hoses to get a syphon.

Ugly, primitive, unhygienic - but it always works with every canister filter.

--Nikolay
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Old 11-09-2011, 05:12 PM   #7 (permalink)
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Or a wet and dry vac... Just remember to use it in the output pipe/tube, not on the opposite...


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Old 11-10-2011, 01:30 AM   #8 (permalink)
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Default Re: Priming My Eheim Pro 3

@mrlbem: yes and yes to your questions. Just did a WC with 2075 today. Move your outflow below the water level. And yes, it will also work with filter full of water but the initial suction strength will be lower. Physics at work.

@niko: sucking on a spray bar... Sorry, but you just made me laugh Might take some practice getting all the outflow holes covered Also, just imagine the size of those lungs. Sucking on the intake might take less practice but I wonder how long will it take with the outflow up in the air

<puts on a serious face>Eheim is doing something during priming that most (normal) people would find counter-intuitive at the first thought. Press the priming button and watch what's happening in your tank. You will see air (and muck) coming out of your intake. Interesting. Then, where is the water to fill the filter comes from? Outflow. Full filter or not, with the outflow up in the air, your result will be the same: you are sucking air into the canister. Now Eheim's recommendation to remove the end-cap from the spray bar during priming starts to make some sense. Why did they do it this way? Just think where most people usually put their intake. (hint: suction force generated at the moment of priming into an empty filter is substantially stronger then what's generated by impeller/motor during normal operation).

In any case, I just hope it works for you.

PS: @khanzer22: wet/dry vac on hi on outflow == no fish, no plants, no wood, no stones, no substrate left in the tank. Cool, we just figured out how to fit a 40G breeder into a 2G filter: compaction

Last edited by OVT; 11-10-2011 at 01:37 AM..
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Old 11-10-2011, 04:08 AM   #9 (permalink)
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Quote:
Originally Posted by OVT View Post

PS: @khanzer22: wet/dry vac on hi on outflow == no fish, no plants, no wood, no stones, no substrate left in the tank. Cool, we just figured out how to fit a 40G breeder into a 2G filter: compaction
It's just a matter how you'll use/operate it




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Old 11-10-2011, 10:50 AM   #10 (permalink)
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Default Re: Priming My Eheim Pro 3

I just changed the hoses on my 2071 and had trouble too but I found easy way to prime.

At the top of your hoses, the plastic brackets that connect to your intake and outtakes has a cap screwed onto each top. Unscrew the caps and use a funnel to fill the hoses with water. Once your hoses are full the prime push button works like a charm. I've had my filter for a year and never realized what that cap was for until now.
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