so yeah...
back on topic. You could use anything for a bait tank / live well. Its a project with in itself. You could make your own bait tank. What some guys do or just.
But know that when building learn from others mistakes.
What type of pump your getting, battery type, life of the battery, tube length, strapping it down to kayak, additional rod holder, wiring the battery to the the pump tank and switch. Much comes into play.
And instead of dragging a bucket around you have it on you. So you don't get caught on anything. Your line, and would never make it in the kelp beds.