Powder brown dead can't figure out why

[Fall3nxspitfire]

hello everyone first post here so sorry if missing details

i just got into the hobby bought a 75 gallon tank and built a 20 gallon long sump and did all my research and decided for my first fish i wanted a powder brown tang and some chromis (i know that 75 is small for a powder brown tang but he was tiny (approximately 2 1/2") and i was planning to upgrade to a 200 gallon within the next year.

i assembled everything bought 30 pounds of pre-cycled bio media (from the LFS reef tank) drip acclimated my fish for 4 hours and put them in.


i monitored parameters and fish closely for the next month and went through 1 ammonia spike then nitrite spike then they leveled out to zero i check ammonia nitrite and nitrate 3 times a week now and do a 30% water change when nitrate reaches around 20ppm
since these were my first fish and i bought them all at once i decided i could use my tank as a QT for at least this first set of fish and later as a permanent qt once i upgraded to the larger tank

i noticed when i got the tang he had a little bit of redness in his cheeks and figured this could be flukes so after giving them a week to settle in i gave him a fresh water dip and to my surprise there were no flukes that came off of him.
after two weeks the redness went away and his colors brightened/darkened to look like all the pictures you see of a powder brown so i attributed this to possibly ammonia burns from a previous location he was held at

throughout the 3 months i've had these fish i haven't noticed any signs of velvet nor ich
no heavy breathing, no spots, no flashing.
everything seemed fine, this morning i woke up and fed all of my fish and noticed he was a little pale and didn't want to eat. it was a little earlier then i normally feed them (had to go early into work) so i chocked it up to maybe him being grouchy for being woken up so early

well fast forward to me getting home from work and i found my beloved powder brown Gilbert dead on the floor of my tank
im crushed
i would just like to know what killed him so quickly and how i can keep this from ever happening again\

 

[stacksoner]

Those little black dots that you can see through the flesh are parasites.

 

[Fall3nxspitfire]

Those little black dots that you can see through the flesh are parasites.

do you know what type they are? i couldn't find anything on them only a thread that said it was natural dots that show when they are stressed

 

[stacksoner]

do you know what type they are? i couldn't find anything on them only a thread that said it was natural dots that show when they are stressed

People refer to it as Black Ich. You should be able to find plenty of info on it

 

[vetteguy53081]

I see black ich also, although it is not actually ich but work infestation but disease.
Black spot disease is caused by a parasite that commonly affects tangs and other Surgeonfish and is contracted by other fish species and shellfish as well. Black spot disease is also referred to as tang disease or black ich, although ich is actually caused by a different type of parasite. The black spots on the fish are tiny Paravortex turbellaria flatworms embedded in the skin of the fish. Black spot parasites are much less dangerous and life-threatening, and easier to treat, compared to parasites such as Oodinium, Cryptocaryon and Brooklynella.
Typically, the infested fish will scratch up against objects or the substrate in an attempt to dislodge the parasites, and if the infestation is allowed to progress the fish can become lethargic, lose their appetite and colors, and if the gills are affected rapid respiration develops.
For treatment, a freshwater bath, followed by a formalin bath first, then continue treatment in a quarantine tank. Praziquantel has been used with some success to treat affected fish in quarantine tanks. unfortunately, these worms can
survive for several months without a host fish.
Young worms live in the substrate and feed on detrious and organic waste until they go in search of a fish host. Siphoning up the excess organic matter that builds up on the bottom of the aquarium can help to control their numbers.
MY BEST SUGGESTION IS TO REMOVE ALL FISH FROM TANK FOR AT LEAST 2 MONTHS TO ASSURE THE WORMS HAVE STARVED OFF

 

[Zack K]

I see black ich also, although it is not actually ich but work infestation but disease.
Black spot disease is caused by a parasite that commonly affects tangs and other Surgeonfish and is contracted by other fish species and shellfish as well. Black spot disease is also referred to as tang disease or black ich, although ich is actually caused by a different type of parasite. The black spots on the fish are tiny Paravortex turbellaria flatworms embedded in the skin of the fish. Black spot parasites are much less dangerous and life-threatening, and easier to treat, compared to parasites such as Oodinium, Cryptocaryon and Brooklynella.
Typically, the infested fish will scratch up against objects or the substrate in an attempt to dislodge the parasites, and if the infestation is allowed to progress the fish can become lethargic, lose their appetite and colors, and if the gills are affected rapid respiration develops.
For treatment, a freshwater bath, followed by a formalin bath first, then continue treatment in a quarantine tank. Praziquantel has been used with some success to treat affected fish in quarantine tanks. unfortunately, these worms can
survive for several months without a host fish.
Young worms live in the substrate and feed on detrious and organic waste until they go in search of a fish host. Siphoning up the excess organic matter that builds up on the bottom of the aquarium can help to control their numbers.
MY BEST SUGGESTION IS TO REMOVE ALL FISH FROM TANK FOR AT LEAST 2 MONTHS TO ASSURE THE WORMS HAVE STARVED OFF

+1