my live well is 3.5 gallons mae out of polyethene plastics it's rotomolded it is caplable of circulation (outside water in ) and it is insulated i currently use a air pump and air stone it sit's inside a hatch on my yak sorry i need to get some pics up and the anchor is still waiting on the patent so sorry can't post that one yet either

i found that more than 3 gallons and it get's a little heavy for a kayak and controling water temp is easier when you use the water in the tank whenyou ciculate the temp changes top much and your bait dis let me go try and get some pics of my tank