[header] How to acclimate your betta [title] Choose a tank for your betta. [step] 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.