My livewell does exactly that. His is a Triton and he has a neater livewell setup. He has ON, which does what mine does and what you describe..........it has RECIRC which recirculates (stirs) the water in the well without bringing in new........and then 'Auto' which does both!

Still you make good sense. Just another $40 worth of ice to fill my TWO big livewells up!!!!

I have an add on recirculating deal (Made to make a livewell out of a big cooler) and I would like to figure out how to wire that in to my timer on my two livewells.......

And the water surface temp was about 83 degrees.