Me too. Fortunately though, I don't have to wheel barrels around. I don't know how long I could stand doing that. Sink to RODI
to barrels to tank is only 10-12 feet tops.
I also have a pressure switch in the system that shuts down the booster pump when the barrels are full, but the waste water will never stop running down the drain unless I manually shut it off.
Why not do the collecting in the barrels with float switches, then manually fill the moveable barrels while you are present?
It's funny you saying "the sound of running water is not uncommon in the fishroom!" but if you are like me, you kinda know the difference between the regular running water, and "something's wrong" running water...lol. At least I like to think i do