I just wondered what others thought about this.
When trying to keep schooling fish such as tetras, barbs and cory cats, and over time they all die but one and it lives for several years, should we buy others to keep it in a school that it needs, or should we just see how long it can live without living in a school? The reason I ask is that I have 1 green cory that's 9 yrs. old and 1 neon tetra that's around 3 yrs. old. Now if I add others to make schools and they live for a while and catch up in size, I may not be able to tell the old one from the new ones. Then when they start to die I will no longer know how old that one old fish was when it died. I think this might an exception to the rule, if we are trying to determine the lifespans of our fish.
When trying to keep schooling fish such as tetras, barbs and cory cats, and over time they all die but one and it lives for several years, should we buy others to keep it in a school that it needs, or should we just see how long it can live without living in a school? The reason I ask is that I have 1 green cory that's 9 yrs. old and 1 neon tetra that's around 3 yrs. old. Now if I add others to make schools and they live for a while and catch up in size, I may not be able to tell the old one from the new ones. Then when they start to die I will no longer know how old that one old fish was when it died. I think this might an exception to the rule, if we are trying to determine the lifespans of our fish.
