saltwater fish onlt tank 72 gallon, on end of cycle 6th week. temp 77 and amonia and nitrites are at o level. why are all fish dying except the cleaner shrimp ? just did a 40gal water change and added a tomato clown and two blue damsels ,one and a half days later two damsels dead and clown hovering near the top of tnk. cleaner doing ok i used too much prime maybe before he 40 gal
change ? and i used nitro max to help cycle the tank faster. i think i used too much of that also but not sure why fishes are not making it when all my water tested are good ?what do you think????