Initially I couldn't find any espeis so went with rn---dear lord, they went after my betta within 24 hours of being in the tank. They went back to the store. I've heard many mixed stories regarding tetras and a betta. I wonder if some lemon tetras would bother any other fish in my tank. And, it seems that it's now pretty well stocked and I don't want to take the espeis back to the store. What do you think?