Eheim 2028 - to much aeration

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M

mickdigler

Feeder Fish
MFK Member
Dec 3, 2008
13
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Cleveland
I am having a problem with my 2 new Eheim 2028's. They run fine but create so many bubbles in the tank that the tank looks cloudy. I know air is good but this is way too much. I even had a big ornament flip itself over because an air bubble developed inside. Luckily no fish were hurt.

When I was first running with the stock spraybar output it made so much noise and bubbles I figured it was due to air in one of the lines or the canister itself. I tried what was suggested in this thread several times on both the intake and output and it made no difference. I ended up taking off the spraybar sections from the output and running it wide open. The noise went away but it still bubbles up the tank a lot - not as much as with the spraybar but still a lot. This is happening on both of them but one is a little worse.

Is this happening because there is still air in the system or is this just normal? I would think that without spraybars the aeration would stop or at least be at a minimum. If there is air in the system I was under the impression that these canisters self-vented. Thanks for the help!
 
Thanks for starting the new thread.

I know these questions are going to sound strange but....
What size tank is the filter on?

Where is the filter located in relation to the tank?
Below the tank? - if so, measure from the top of the filter to the tank's water level.

Do you have an airstone or bubbler running in the tank anywhere near the intake or suction strainer?

Can you possibly post a pic/photo of the filter and tank together? Not required but may help troubleshoot the problem.
 
Usually one of two things is happening here and deeda is on the right track...it's usually either air still in the canister or tubing somewhere OR bubbles from an airstone or powerhead getting sucked into the intake of the canister and getting pushed back out as the smaller bubbles you are seeing.

Once you get the air out, I think you'll find that you can go back to the spraybar if that's the return you prefer. Sometimes solving the problem is as easy as shaking the filter a little, turning it on and back off several times, etc.
 
What size tank is the filter on? - 80 gallon

Where is the filter located in relation to the tank? - below, in the stand

Below the tank? - if so, measure from the top of the filter to the tank's water level. - 35"

Do you have an airstone or bubbler running in the tank anywhere near the intake or suction strainer? - the canister's made so many bubbles I never turned the bubblewand on.

Can you possibly post a pic/photo of the filter and tank together? Not required but may help troubleshoot the problem. - I can get a camera and take pictures but don't know how to post them.

Thanks!
 
Hum, still sounds to me like the canister is not fully filling up/priming or there's air still left in the tubes.
 
Not sure if this makes a difference but pushing the priming button wasn't working very good when I first set them up. So I took the top caps off the intake and filled them with my python until the canisters completely filled and water was started coming out of the output. Once that happened I turned them on the they started pumping.

Of course after that I tried several times to purge the air using the methods described in the other post along with shacking the canister and tapping the lines.

Don't these self-purge air?
 
Turn off the canister for a minute or two so you can be sure it fully fills via the siphon....... Then tilt the body of the canister in an effort to release any air up into the lines. You may have to repeat that.
 
Perfect answers!! I tend to agree with davidtcb1 that maybe the filter still has air in it.

Let's try this.
Refer to the owners manual, page 24 in my manual, for Maintenance & Servicing.

Unplug the electrical cord to the filter, close the hose adapter so you can disconnect the hoses. Have a small towel ready to catch a little bit of water.

Then grasp the canister to remove it from under your stand without tilting it.

Take it to a sink so you can empty ALL the water out of it. It might be easier to take the media baskets out of the filter to do this.

Reassemble the filter according to the instructions and DO NOT add any water into the filter.

Take an empty pail over to your fish tank, point the hose adapter that connects to your filter into the pail and move the lever toward the hoses so the water flows into the pail. This guarantees there is no air trapped in the hoses. Now close the lever and remove the pail.

Put the filter back under the tank and connect the hose adapter back to the filter. Water will now fill the filter canister and PUSH all the air out of it. You really don't need to push the primer button because the hoses are already full of water.

Wait til all the air comes out of the filter before plugging the cord back in.

This should solve the air bubbling problem if there was trapped air in the filter. I've never had any luck shaking the filter to get rid of trapped air but this method has always worked for me.
 
deeda;2551231; said:
Put the filter back under the tank and connect the hose adapter back to the filter. Water will now fill the filter canister and PUSH all the air out of it. You really don't need to push the primer button because the hoses are already full of water.

Wait til all the air comes out of the filter before plugging the cord back in.
Click to expand...

Great, thanks! I follow all of it except this part. If I empty the hoses into the pail and then reconnect them to the canister how will water start filling the canister again without pushing the primer?
 
Because the water will flow by gravity into the filter, pushing the lighter air out of the filter and up into the tank. You will see a lot of air blowing into the tank. It happens pretty fast. That is one reason why I asked what the distance was from the tank water level to the top of the filter. You have to have enough distance to have the water help push the air out of the filter.
 
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