I have a fully mature male green severum and I have introduced a female who is 3/4 the size of the male. I know that they don't pair easily but he is aggressive towards her after being together for about half an hour so I have separated them with a perspex divider so they can see each other. Any other ideas? is the situation likely to change or should I just return the female to the LFS? and get other fish? they are in a 55 gallon tank with a couple of bristle noses and an algae eater.As I've had the male a while I don't want to get rid of him.