| | All glass bubble counter
I purchased a couple of all glass bubble counters on EBay.
They are 5/8” OD, with tubing connectors at both ends; one end has an extension inside the main tube.
That extension must be the lower (incoming) end. I think that to fill, you have to immerse one end into the counter fluid and suck on the other.
Each one has two suction cups to affix to the glass.
Question, is the BC mounted on the outside or the inside of the tank?
I will be diffusing through an “atomic” diffuser.