Please help identify Parasite or disease!

[JayChen]

This clown has been swimming at the same spot for the whole day. I had a pair and the other one died yesterday. I always thought that they have ich so I've been dosing polyp and stress guard, which helped to cure ich before. But today I found that this fish doesn't have the white spots anymore, but it is definitely shedding its slime coat. All corals in my tank do fine (except that my hammer is always spitting zooxanthellae) and I have a pair of harlequin shrimp that are healthy. What might be the problem here?

Parameters:
Ammonia 0
Nitrite 0
Nitrate 0
pH 8.0
Temp 78F
Salinity 1.025

One more question, if it's ich, how long will it survive in a fishless tank?

 

[JayChen]

Btw all my fish were swimming and eating well, until the other fish died yesterday and this one behaving like this.

 

[35ppt]

Looks like brook to me, some info:

Brooklynella

Brooklynella hostilis What You Need To Know: * This is most often seen in clownfish, but it can afflict any fish. The fish’s skin will appear to be peeling or sloughing off, oftentimes causing excessive white mucous to form around the affected area(s). * Treatment of choice is a 45 minute...

www.reef2reef.com

 

[NowGlazeIT]

Brookynella

 

[35ppt]

One more question, if it's ich, how long will it survive in a fishless tank?

76 days

 

[35ppt]

Also that hammer is going to want some detectable levels of nitrate and phosphate. I will leave some info on ich since you mentioned that. Stress Guard is not going to "cure" ich.

Ich (Cryptocaryon irritans)

Marine Ich (Cryptocaryon irritans) What You Need To Know: * Mild fish parasite which is often managed by using a UV Sterilizer, Ozone, Diatom Filter, Oxydator, herbal remedies, enhanced nutrition, etc. etc. * Can be treated in a quarantine tank using Hyposalinity, Chloroquine, Copper or...

www.reef2reef.com

 

[JayChen]

Also that hammer is going to want some detectable levels of nitrate and phosphate. I will leave some info on ich since you mentioned that. Stress Guard is not going to "cure" ich.

Ich (Cryptocaryon irritans)

Marine Ich (Cryptocaryon irritans) What You Need To Know: * Mild fish parasite which is often managed by using a UV Sterilizer, Ozone, Diatom Filter, Oxydator, herbal remedies, enhanced nutrition, etc. etc. * Can be treated in a quarantine tank using Hyposalinity, Chloroquine, Copper or...

www.reef2reef.com

I know it will not, but it did helped my fish fight it off.