My friend had one of those tanks and it was terrible. The fish always looked sad, they could hardly move around, and it needed to be cleaned almost every other day, if not every day.
They have some great little tanks for $20 or less that are about a gallon or so that have a light and would be perfect for a SINGLE betta.
They have some great little tanks for $20 or less that are about a gallon or so that have a light and would be perfect for a SINGLE betta.