I have 2 RTC 12 inch each they live in a 1500L pond with 2Paccu, 2eels and 3 Oscar. Lately Ive noticed the fins lateral and dorsal fins damaged (pic) not only are the fins torn I can see some wounds also. They used to fight when they used to live in a smaller tank when they were 3 inch but it stopped once they got to the pond. The other guy also has similar injuries but not as much. I havent seen them fighting during the day but are a little aggressive during feeding. Im in the process of building a larger pond which will take another 3 to 4 weeks . . what can i do ?
