Just wondering but are your fish dying or something? If you have a spray type head I'd bet you're getting plenty of oxygen. Just change out thatnon adjustable switch with an adjustable one. It's all DC power so its easy peasy. Either that or just close the live well before you load e boat and throw a bag of ice in their on your way home. They'll be fresh as a daisy. You can buy a lot of ice for 50 bucks.

BKB