A lot of good ideas listed here! Something I use and have been very impressed with is the V-T2 Livewell & Baitwell Ventilators. They are very inexpensive, currently $31 on sale.
www.v-t2.com and they are made here in KY. I know a few dealers have them installed in their new boats on the lot.
The V-T2 is an all natural, environmentally safe, and affordable method for cooling livewell/baitwell water, increasing aeration and dissolved oxygen, and reducing harmful metabolic waste (CO2 gas).
The V-T2 creates a fresh air flow throughout the livewell or baitwell. This air flow cools livewell/baitwell water and interiors, provides more aeration and oxygen, and expels harmful gases created by metabolic waste.
Justin Hires
National Divisions Coordinator
www.USABassin.com