hello everyone i went to my local pet store today they had a 2.5 gallon all glass tank set up on display with 3 african cichlids in the tank all about 4 inches each the guy said that the tank that size would be great for me since i dont have much space i want to know what type of fish i can get i just want one fish that doesnt get over 3 inches and i dont want a betta i want 1 fish that has a lifespan of 8 years plus, the tank is 12 inches long 8inches tall 6 inches wide 2 half gallon all glass tank with a clear free penn plax corner filter with a glass top and fluorescent light , and a 25 watt heater no gravel i also got a test kit liquid api , along with cycle to help it cycle , please let me know what type of fish i can get, thank you and have a great weekend