Watch the video Wired2Fish on how to keep fish in a livewell. Basically add about 2” of water in your livewell, plug off your overflow with a bull plug. Put your livewell on recirculate so no water can enter your livewell with the overflow plugged off. Add a 20# bag of ice to the livewell with a fish additive (Gjuice) or similar. Close lid. After first fish is caught put your livewell on auto and fill to 2” under your overflow that is plugged off (you will have to keep an eye on your livewell so it doesn’t get too much water in it. When it’s 2” below the overflow turn your livewell on to recirculate. This will recirculate only your cold water in the livewell. Only open to put fish in. Good luck.
Thats a lot of work for a fish I am going to kill any way