I don't know if this behaviour is normal or not with neons? Over the past week or so they have been very nippy, i had 4 in the tank and it was suggested that it was perhaps because they needed 6+ in the tank as they are schooling fish, i upped them to 10 yesterday but the 4 bigger ones still seem to be nipping at eachother. I thought they were supposed to be really placid? I don't spose it could be a learned behaviour from living with guppy's? lol Or mating ritual? Any suggestions? x