In my 29 gallon tank, I have 5 plates - a male (Chilli), three females (Apricot, Jean, and Samoa), and one I thought was female (Reggae). Reggae has since turned out to be a boy (he did a good job hiding his gonopodium!) and has little tolerance for Chilli, chasing him repeatedly. This morning, I caught them all-out fighting - the two were circling each other and nipping for a good 10 minutes, looking like mbuna! They have since stopped, but Chilli now has a clearly nipped dorsal fin. Have any advice on what to do now? Should I just keep an eye on them?