[alanw]

Originally Posted by CardShark

Have you ever put bait in there without the pump on, with just the drain plug open? I've read that some people do that, which fills the bait tank up to the water line and as the kayak moves, fresh water is forced into the tank through the drain hole. For smaller bait, you might have to put a screen on there

Yep, I did that when I was undecided whether I wanted to drill a 1" hole in the bottom of my yak. I did use a garden hose screen in the hole to keep anchovies from exiting the tank. There just wasn't enough water in there to support a full kayak scoop of anchovies. It should work fine for a smaller amount of bait but I just never tested it that long before installing the pump.