Doesn't like Kool-Aid
Join Date: Feb 2003
Location: Hawthorne, New Jersey
I really can't understand how your water is saturated with oxygen when you are using a DIY CO2 set up and only 1.6 WPG?? You must have a real magical touch! DIY CO2 setups usually become non productive in aquariums over 40G, and you've got it rolling on a 100G. You really must pass on your secret to the rest of the board! You will be able to save us an awful lot of money in the future.
As for Rumple's Eheim, there has got to be air leaking into your system somehow. How, I don't know. I would follow the advice of your LFS, since they seem to have the experience. I believe there has already been a thread on this. Do a search.
My 2126, same as the 2026 can be a bit tricky at times. You must be certain that the "tubes" in the baskets are all well aligned, and well seated in the powerhead portion of the filter. If it is not assembled exactly, the Eheim will throw some bubbles.
Take it apart and put it back together, slowly and carefully. That may solve your problem.