I have 3 vits in a 500 gal with other fish, they are the samllest in comparison to the other fish. They eat well together and most of time tolerate each othet but then there are times they chase one another and i see bites and small scratches on their sides, tears in their fins, etc. My question is will the aggressive subside as they grow in size. Presently 7 to 8" each one. They have plenty of room and ample water flow and filtration. Ive never tried a trio before so any help would be helpful. Thanks