I have a pair of 1" juvi tiger oscars in a 55 gallon (I know it's too small for full grown oscars and I will get them out of there soon). Ever since I got them the pair has been depressed and sitting in the corner doing nothing at all. They will occasionally nibble on sinking food but don't swim and just stay together. Do I need dither fish? Or just wait until they start behaving normally. They are still pretty dark and their colouration is quite bright, so they seem otherwise healthy. Any ideas/suggestions?