I have a 3" Umbee who has developed "head twitching" with "flashing" off of rocks.I would like to take some pics,but he hides most of the time and when he comes out and sees me he goes right back to hiding.There is no visual "ich" spots actually there is no signs of disease at all except for what is mentioned.There is a lot of aggression in my tank so could this be causing the problem??What can i do to fix this fish(he will be going into his own 20 gal long later,should i get some meds??If so what??Thanks!!