Shad tanks and filters are a necessity for shad. It's not lack of oxygenated water or temperature that kills them its the loose shad scales that get in their gills and suffocate them. That's why guides and striper fishermen use rounded bait tanks with recirculating pumps that continually re-circulate the water through a filter that catches the loose shad scales. The round tank keeps the from injuring themselves. You can build a home made filter for about anything including live wells. Foam filters that are washable work well.