Tom,

I noticed the other night when the reactor was turned off (and the lights as well) that the CO2 buildup was bubbling every so often, like 5 minutes or so. I thought nothing of it, because that is what the burp hole was designed for.

Well, I decided to watch it just for curiosity's sake, and it turns out that it doesn't even build up close to the burp hole. Instead, it is burping out of the powerhead intake! What do you think of that?

Here is a pic of it, although it has moved to the outsource of the filter now:


Current placement: