My betta flares at my panda cories and chases them around the tank. After a week or so the flaring stopped but he still chases my cories whenever he sees them. The cories sometimes nip on my bettas tail when he is at the bottom of the tank. My betta also ripped off a large part of my cories dorsal fin. Is it really alright to keep a male betta with two panda cories?? Or should I seperate them? Please help.. They live in a 5 gallon tank with live plants and small rocks. I put aquarium conditioner and a filter.