I've looked at them. I think they will work-as is, but might not work with pumping the water up into a spray bar type system. Also in a sealed container(cooler) the only air circulated is what's in there. With increased air injection/agitation when out in the hot weather on a boat/dock/back of truck the water temps rise much quicker and therefore oxygen retention in the water is lessened. For you, depending on the ocean water temp when you're collecting (like at night), you might not notice much of a rise, if any at all.