Answer by  
                                                                                          Lisa89 (47)
                                                            
                          
                          
                                                          For a small aquarium the best algae eater is a snail. You can use two or three if you have a large algae problem. Any type you like is fine. Fish tend to pick on each other when they feel crowded. Especially if you are introducing a newcomer, the current fish feel it is their territory.