Eheim 2213 flow decreases to a trickle

**grenlif** · 3rd Dec 2012, 09:24

Hi everyone, I need some advice for a noob here.

I bought a second hand Eheim 2213 canister from a AQ bro about 6 months back for my shrimp tank. It was working very well until around 3 months back, I noticed that the water flow out of the rainbar started to slow down eventually to a trickle. I changed the wool filter thinking that it might have clogged up and after that the filter worked fine.

But around 4-6 weeks later, the water flow slowed to a trickle again.. I dismantled the canister, gave it a quick cleaning (even the impeller), connected it back and it was back to normal.

Now, 4-6 weeks after my last cleaning, the water flow out of the rainbar slowed down to a trickle again! This time I noticed that there's a soft but audible humming noise coming from the canister. I shook the canister a bit and the humming noise got louder.

I wonder what's wrong. Is it because it was an old filter? The previous owner said it was used for about 1 year and had no problems. Any ideas on how to resolve it would be helpful.

Thanks!

PS: my inlet is covered with sponge, and I don't have a pre-filter nor a chiller.

**Navanod** · 3rd Dec 2012, 09:49

Hi grenlif,

The inlet sponge, how often do you clean or change it?

**Shadow** · 3rd Dec 2012, 10:13

Have you checked the impeller area? See whether impeller spoil. Or maybe it is just an air trap

**grenlif** · 3rd Dec 2012, 10:43

Originally Posted by Navanod

Hi grenlif,

The inlet sponge, how often do you clean or change it?

About once a month? I just give it a good squeeze in the discarded tank water during one of the WC. Come to think of it, it has been more than 1 month since I did that. I shall do that very soon. Thanks

Originally Posted by Shadow

Have you checked the impeller area? See whether impeller spoil. Or maybe it is just an air trap

How can I check that area? I just opened up the small catch and took out the impeller for cleaning. Is that the area you're referring to? It was just a bit slimy when I cleaned it about 4-6 weeks ago.

Will air trap cos the filter to have a humming noise?

**Shadow** · 3rd Dec 2012, 13:19

yes that is the part. there should be ceramic rod at center. the ceramic rod is hold by 2 rubber tinggy on both end. just make sure everything om place.