Put a small inline on/off valve close to one side; that way you can turn off the one side, and clip a hemostat (or whatever) to the open line when disconnecting - just leave enough line on the valve side to bend it out of the way to clear the frame during tank removal.
I do that on all my tanks with balance tubes - it saves messes.
I do that on all my tanks with balance tubes - it saves messes.


