OTAB’s keep Bait Fish, Shrimp, Crawfish & Tropical Fish alive for hours by releasing bubbles of  90% Oxygen and 10% Carbon Dioxide. 
OTAB’s can be used in Fresh or Salt water. They Do Not Dissolve, Do Not Contaminate the water & are Eco-Friendly. 
An unlimited shelf life (stored in cool dry place)
Otabs are a one time use tablet packaged in an airtight Metal Canister 1 ¼” in diameter with a metal lid and will keep from one season to the next or longer if stored in a dry place.
Each tablet releases thousands of bubbles of oxygen when dropped into a bait bucket and work for 4 to 6 hours according to size and type of bait.