I knew someone was going to make me drag out the camera
BTW, I assume the air pump has enough backward (for lack of a better term) resistance to prevent the hose with the water from just becoming a siphon and emptying in the sump?
I have the output tube placed above the water line so I don't have to worry about a siphon forming.
Also, when you refill the carboy do you disconnect the tubes from the lid?
I just hold the lid in place and spin the carboy. Mine only holds 2.5 gallons so it is pretty easy to move around and I have extra length on the tubes so I can do it on the floor with no trouble.
I have to admit the hardest part of the system was finding a container of decent size with a tight sealing lid that wouldn't give away under the air pressure. Once I found the Nalgene Labware website (
http://www.nalgenelabware.com/) I tought I was home free but a new carboy like mine is about $85!! I found some used ones on eBay for $11 and I was all set.
Here are some pictures of my system.
This one shows the float switch and the hard output tube connected to my tank.
Here is is in action.
Here is a wider angle. You can see the kalk mixing under the tube.
Here is the carboy in my stand.
A shot of the tubes in the lid.
And some tank shots just because.