i had this guy for a 6 months at most got him at 2 inches and now 4 inches. he used to chase around 2 id sharks but when i moved the id sharks to my pond he had no one to pick on so he started chase my aro which is 8 inches. now aro hides in filter and is not active but looks healthy and eats a little bit. when he sees the dat he always hides even though dat is smaller. i think is my dat doing this do you think so. if it is the problem i will put dat in pond with big id sharks.