so i have a 10 inch male and bought a thought to be female . Got her as a fry and now is about 4.5 -5 inches was in a 55 gallon till now i put her in my 135 with the big guy . With a divider well today i had to take out some egg crate i had on the bottom of the tank for the rocks so they would not hit the glass . well it ended up making the tank worse off then without it so out it went . So i let the divider come out too and did a big water change now when everything was out the female starting chasing my big male and flaring up to him and he would flare up and puff his gills and had his fins all at attention like showing off& would swim around all fast, she would just follow him around circling him . Now that everything is back in they seem to be getting along just fine they are swimming around together mostly and sharing the tank . could they have paired up ?? here is a video showing what i could get on video[video=youtube;CGz5q4b-q3s]http://www.youtube.com/watch?v=CGz5q4b-q3s[/video]