I don't believe in the plop and drop, as you would be introducing the water from the store into your tank, and you don't want that, as it could carry any matter of bacteria, fungus, ich, etc. Remember, these stores are run on a CENTRAL SYSTEM, which means all the tanks are exposed to the same water, and all it takes is one sick fish for all the others to be exposed. I always acclimate, adding a small amount of my tank water into the bowl the betta came in every 15 minutes, until 45 minutes have elapsed, and then I either net the betta or gently remove it with my hand to release it into my tank. Much more gentle and humane, in my opinion, then to just plop and drop.