What is the most logical next event?

How to acclimate your betta
Choose a tank for your betta.
In their natural habitat, bettas live in murky, stagnant water. Although they can survive in very small, cramped tanks, it's healthier for the fish to give it a larger environment.
Look for a tank that is holds around five gallons of water, as this will give the fish plenty of space. Do not keep your betta in a tank smaller than one gallon.