Bait tank help

[kiyo21]

Hey anyone got pics or tips on a good bait tank setup?

I'm going to be making it homemade and I just need a little insight.

Q:

1) 3 gal or 5 gal bucket?
2) square or round?
3) I'm looking at the 360gph or a tsunami t1200,800, or 500. But I'm not sure what gal per hr I should be looking at for a bucket on a yak?
4) what case or battery holder should I look at?
5) And last if you guys have your own pics of your homemade tanks or even prefab tanks I would love to see some builds!?

Cheers guys and thanks,