Sorry, hadn't gotten around to posting a picture of the pump setup.
Here it is:
In order to disconnect the reservoir, I need to unscrew the top connection in the first picture (on the top of the bong), BLOW really hard through it, while there is no more water in the lines and air is going into the reservoir, I turn the red handle, and cut off water flow back into the loop, and then disconnect the connection right after. Then ... I have to wiggle and pull the connection off ... which is a pain because I either have to yank the pump around or hassle with moving the reservoir full of water.
Thats my system as of right now, and its a real PITA.
edit: in case anyone wonders, the eheim is on bubble wrap to isolate vibrational noise, and the other large dark object is the UPS