One Betta in a Five gallon tank only one in a five gallon tank if you want two put it in a 10 gallon tank make sure it has gravel and real plants and a heater with filter you have to chandge filter sometimes and a hidding spot for it.hope it helps!
i am not sure but maybe minnows cause my neighbor has one and she feeds it minnows and ya ask a expert ask at your local pet shop they can always help you.
3 beta fishes 2 if you have a lot of plants and decorations or instead of 2 or 3 betas why not some guppies or minnows or small gold fish.hope it helps!
it needs more food or the algea eater was sucking on it so ya i would be super concerned and im a fish person.i have two algea eaters and i saw it sucling on my koi fish so ya algea eaters will suck on any types of fishes.