scottv said:If it's in a big enough tank and you know it's aggressive....maybe try a JAGUAR!!![]()
What kinda fish is it picking on?
with the above. once a fish hits maturity (~6" for an oscar) it can be very difficult to get them to accept new tankmates. tank size will play the biggest factor though. the tank will have to be rather large (125 or more imo) to be able to get this to work. if your tank isn't that big, you could upgrade to a larger tank. set the tank up entirely different than the tank your oscar is currently in and add the oscar as well as whatever tankmates you wish to keep with it at the same time and keep a close eye on them for a while. babychris said:hes 12 inches and I have a 150g with silver arrowana only. he fought my arrowana and my silver got injured and lost eight scales behind its gills.
