building my very first bait tank need help

[Siebler]

I think you may want to up your outlet size. Water coming in is pressurized, exhaust is not. It is going to overfill the tank most likely.

As for batteries, We stock 6v 12ah for use in our tanks. No traffic now that its winter unless you hit it at prime time on Sat/Sun. Rest of week only cars in the lot are employees most the time.