After noon, I got this nice yellow guppy BUT he is so annoying. I fear he is stressing all my fish out by chasing them. I got 5 male n 5 female. The males chase the females then stop but this yellow one chases males and females. He gets in front as if to show off and then does it to the rest. Any reason for this and will he stop? He is 2 mins away from being flushed!!! Thanks in advance