Hello thanks for the reply scorp, unfortunately I took the female back yesterday as she ended up attacking Fitzgig 4-5 times in an hour, I caught the inital attack on camera vid which will update later to show initial. What drew the line was the frequency, she ripped his tail and also at one point lifted him out the water into the lid. Not all bad news though the manager is going to give her a good home. As to Ftizgigs tail now, it is a little raggedy and possibly white edging, have added melafix minimal dose to help hopefully stop bad bacteria/infection setting in, if anyone has any other tips other than calm and clean water, please let me know.