11-10-2017, 04:56 PM
Join Date: Oct 2010
| | Gas in eheim
After running quietly for about a month or so my Eheim 2217 has started making noise from bubbles going through the impellor.
I've run Eheims for years, and I don't think this is trapped air from when I set it up. I also have a 2213 running on the same tank, which is silent.
I've checked for water leaks. None.
All the hosing was connected by dipping in hot water to soften before pushing over the barbs and hand-tightening the connectors. Everything seems like it should be fit snug.
Perhaps air is getting through the O-ring on the pump housing? I'd expect this to leak, though.
The filter is mostly filled with Seachem Matrix. Could the anaerobic bacteria in this media be producing enough gas to make audible noises when it hits the impellor?
There's an inline diffused on the output, but it's a fair bit away from the impellor, and I'm hearing gas even when the CO2 is turned off.
Bit stumped on this one, so figured I'd see what others had to say before I spend money to replace all the hosing, O-rings, and emptying the media basket.