they should be kept in a round aquarium that simulates fairly warm water for natives, a strong current and open water, size depends on the number of fish but they do better in schools. some sportinggood stores sell shad keep, wich is basically a water conditioner and dechlorinator specialized for shad, it allowed us to keep a whole bunch of shad alive in a tiny live well on our boat while using them for bait. anyone who has fished alot knows shad are difficult to keep, but they are a very cool fish in an aquarium, saw them at an aquarium in corpus christi, they look great if cared for correctly in a tank.