Hi - I bought my boat new a couple of years ago, but I still do not understand how the livewell operates. There is a toggle switch on the dash board that runs the aeration. There is a hole just above my transom drain that looks like a water inlet/outlet with something that looks like a flapper. Additionally, there is a water valve inside the livewell that seems to always have water pumping through it, whether or not the livewell aerator button is on. My questions are 1) How does it get water 2) How does the water drain 3) How can I prevent water from getting into it when I don't want it 4) the valve seems to run whether or not the aerator is on - what's going on? I need some detailed instructions since the boat did not come with any. I cross-posted into the Sea-Pro forum as well, but it seems really slow. Thank you.