last week I added 2- 4" tinfoil barbs to my 55gal, that houses 2 -12" oscars, 1-10" jag, and a 15year old 14" pleco(I know that is a little crowded but i have a 150gal acrylic in my garage that I am building a stand for).my jag was fine for the firt day or two, now he pretty much just lays there. my tank is well established, and i have been keeping cichlids for 7 years, has anyone ever had this problem before? there is no sign of any fungas or disease, is he just depressed? any ideas what is wrong?