a customer dontated to tiger O's both have HITH and lateral line disease...i know normally both are caused by poor water quality and nutrition. i put them both in a 75 gal at work and have been doing 15%water cahnges each day to keep the water quality up. they eat a variety of foods including brineshrimp cubes, blood worms cube, cichlid flakes, hikari bio gold pellets, ghost shrimp. anything else i can do to help bring these two guys back to optimum health quicker. they are both 5years old and i dont want them to leave this world looking beat up and holey heads...thanks for any help