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Great looking tank.
Did you consider draining almost all the tank in brute trash cans? Fish are easy to catch in the last inch of water. Then you can refill the tank as soon as you have them.
@david p. The wrasse should be weak enough to catch, so a FW dip can be performed to look for flukes: https://www.reef2reef.com/threads/freshwater-dip.248898/
If he dies during the dip, I can promise you he wasn't long for this world anyway. And at least you'll know whether or not your tank has flukes.
Sad day... did my morning check on the tank. My wrasse and red mandarin are dead. No external signs were visible. I fed the mandarin yesterday and seemed fine. The wrasse ate well even if he seemed a bit weak....
Mandarin and wrasse are know for their thick mucus layer. For them to go first is a surprise. But it point to something in the gills? Meaning velvet or fluke?
Unfortunately, I highly suspect velvet here. The FW dip should confirm those suspicions (because no flukes will show.)
Fish with a thick mucous coat - like wrasses & dragonets - will often not show symptoms of velvet, but still suddenly die. With those fish, dinospores invade the gills (where the mucous coat is reduced in composition) and the fish dies due to asphyxiation.
Sorry for your loss But at least you know what is wrong now.
do you think its only flukes or you still think its velveet.. mixed with flukes ??
will do.No way of knowing for sure without a necropsy and microscope examination of the gills, since velvet trophonts are not visible to the naked eye. Since you have already dosed Cupramine, I would stay the course with that and also add Prazipro. There is a risk of a bacterial bloom (cloudy water) occurring from mixing the medications, but increasing gas exchange should offset this problem.
For my main tank, would you advise to treat with prazipro ? the remaining fish in the tank are now avoiding the fish trap, i doubt ill catch them (2x flameback anagel, tail spot blenny, scooter blenny, 2 chromis, firefish, chalk bass, watchman goby)