G4series;4370340; said:umm id suggest taking the piranha out, and rearranging the whole tank. After you rearranged everything, put the pleco in the tank and then add the piranhas. When they're all in the tank you can chase them around and scare them if you want also. They will have to set up new territories and hopefully leave the pleco alone. Then again i dont own piranhas but that works with my cichlids.
Your oscar was attacking your pleco?
