I have a 30g nano tank. All of my fish are dying exepct one fish for some reason, the longnose hawk fish. I had a coral beauty, a saddle back. I added in the hawk fish everything was fine, the coral beauty died and i did my tests i had 0-.24 ammona,8.0 High range PH,0 nitrite and nitrate. So i waited a couple of days because maybe he had a dieases so i examine and i notice my saddle back had flukes so i fresh water dipped him. There was some flukes on him he died the next day. The hawkfish was moving as normally he moved around and hung on rocks like normal. So i waited a week same test results and i add a naked clown and a wymoing white and they die 2 days after they were acting normal hanging with eachother they just died no sign of disease n flukes or ick so i dont know what to do any ideas and the hawkfish is the only fish alive..