whats up all,yesterday i went over to my folks house to make sure everything was ok with there 125.and i found a dead chromis,with another going out the door.after checking the water parameters ammo 0ppm,trites 0ppm,trates 40-60ppm,temp 75ish,ph 8.2.last i checked which was a few days ago everybody was doing fine eating and all.today my brother called to tell me one of there tomato clowns died.any clue as to what could of happened ?i tried everything and i just cant seem to find the source of these dying fish.all other fish seem to be doing great.(atleast it looks that way.)thnx.D