Hi team,

My new Eheim 2227 Wet/Dry canister filter is producing micro-bubbles from the spray bar. These bubbles go a long way to make the tank look 'unclean' as they really pick up the light, and I'm sure they are not good for the fish.

I went with with an Eheim 2227 because I believe in its ability to provide excellent biological filtration as well has enhance the oxygenation/gas exchange process due to the media being exposed to water then air in a constant cycle. However I don't like the fact that it is creating these micro bubbles, and I dont know if this is a common problem with these types of filters. I also run an Eheim 2228 canister filter on the same 6'x2'x2' tank and it does not produce micro bubbles.

Now before you go asking me if the canister has an air leak then think about what your saying, because this type of filter has a huge air 'leak' in terms of that it is a 'breathing' filter i.e. air is constantly drawn into, then pumped out of the canister with the breather hose (the Ehiem 2227/2229 series filters have three pipes going to the aquarium instead of the usual two, one of them is the air breather).

I triple checked and re-sealed the output hoses & joins from the top of the filter all the way to the spray bar and from what I can tell there is no way that air could be comming in, so right now I'm at a loss.

Tonight I completely removed the Eheim 2227 from my aquarium and sure enough within about an hour there were no bubbles in the water, and it even looked alot clearer/cleaner! I've pulled the 2227 completely apart trying to hunt for a problem but I doubt I'm going to notice anything. All looks ok to me.

Becasue of the complexity of the Eheim 2227/2229 Wet/Dry canister filters I'm beginning to think maybe I made a wrong choice. Are they a gimmick/dud?

Does anyone else have experience with these filters? So far my experience is turning out to be a (very) bad one, and I must ensure my filtration is 100% effective before I even think about adding Discus.

Thankfully the 2228 is doing a fine job on it's own... for now.

Regards,

Greggy