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oh, well should i replace him with something? or just take him out?Al913 said:LOL, many people think their fish isn't stressed or there is no problem if the fish is eating and swimming.
The stress is mental health and sometimes you can see it through behavioral. Through many years in the hobby, we know that corys living by themselves or in less than a group of 5-6 they normally don't live long. Again, corys are a shoaling fish, thus they are more social than schooling fish. Lack of being in a group is detrimental to their health. It is similar if I took a kid and secluded him from the rest of his life from any human interaction. After awhile the kid won't be in the best shape mentally, although behaviorally he will still do normal human things