thanks for quick reply
no sign of any abnormal behaviour. gills look fine - certainly no sign of swelling.
have attached better pic. guy at the shop thought it might be bullying by firemouth or one of the catfish?
water change (about a quater) last week but no effect. will test water. if...
hi
hope you can help with this problem. i have a well-planted, 300L tank with a mixture of medium-sized fish. just recently my rainbows (2 reds and 3 bosemans) have started showing what look like scratches. fish are about 4 inches long and have half inch scratches along their sides. have...