Hi! I have had a powder blue gourami and an aglae eater in my tank for a few years. They have always got along till now. Every time my gourami sees my alage eater he chases him and tries to nip at his tail. Why is my gourami doing this? Is it because the algae eater has gotten bigger and it has something to do with territorial issues? My gourami never tries to nip at any of the smaller fish... If any one can tell me why they're not getting along that would be great. I think I might just end up moving my algae eater to a different tank.