battery 6v vs 12v

[echo1er]

So the questions pop up again.
On your fish finder what do you use?
On your bait tank what do you use?

I use 12v on fish finder
I use 6v on fish finder

Fish finder for max reading.
Bait tank I use 6v so the fish isn't stressing so much about swimming

what do you use?
If you have added electronics on the yak what do you have from lights to speaker system.