Lost my tang and a clown? no idea why

[Daniel475]

i lost them all now, the tang was only about 3 inches id say.. it was a slimy clear coat that was on them it developed on monday .. did the 25 percent made water made everything perfect and nitrate still came back at 10... it was 20 before hand.. salinity is 1.024 ph is perfect .. so i think im just going to let the shrimp hermits and snails age up the tank.. maybe it wasnt done cycling? and i think they were just to stressed to survive. Any ideas on what to do? best thing leave it for a month and let it age up?