An aquarium acclimation device and method reduce stress and shock which may occur during transition of marine livestock including fish, invertebrates, corals, etc., from a store, online, or wholesaler, to an owners aquarium. The acclimation device includes tubing, a squeeze bulb, a drip counter, and a rolling clamp. A “J” tube is hung over an edge of the aquarium with one end reaching into water in the aquarium and an opposite end hanging outside the aquarium. The squeeze bulb is connected to the outside end of the “J” tube for initiation of a flow of the aquarium water from the aquarium and a clear squeeze bulb may further provide the drip counter. The rolling clamp and drip counter allow a gradual, observable, and controlled flow for a gradual controlled transition to the aquarium environment.
