I purchased my first canister filter, Eheim ecco 2236 last week because I read nice reviews about canister filter and Eheim brand. However, the filter is much noisy than my Aqua Clear 50 filter. I checked the impeller and it looked fine. I also removed the air as much as I could after I closed it. But still, it has noise, especially when I put it into the cabinet stand. If I push the cover with my hand hardly, it can reduces the noise a little bit. I don't have other canister to do the comparison because this is my first one. I wonder if anybody could give me some suggestions? Thanks!
