Hello everyone, I need some help. My Tang Desjardinii has had a large black spot on its belly for about 2 weeks, and it's growing. It is swimming and eating well, with normal breathing. It is well adapted to the aquarium, peaceful, and has been with me for over 3 months. I did QT when I first acquired the fish with cupramine and prazipro. I feed my fish by alternating Vitalis pellets, artemia, mysis, and spirulina 3 times a day. No other fish is showing similar changes.
- 350L/90 gallons, 8 months old mixed reef tank (sps/lps)
1 Tang Desjardini
3 ocellaris
1 lyretail Anthia
1 cardinal banggai
1 whip-fin wrasse
1 cleaner shrimp
1 Hepatus
CUC: hermits
Temperature: 25.5 - 26.5 °C ( 78 - 79ºF)
pH: 8.1
Salinity / specific gravity: 1025
Ammonia: 0.0 Nitrite: 0.0
Nitrate: 5.0 Phosphate: 0.04
Alk: 8.4
Aquaforest reef salt (20% monthly WC)
I’ll be thankful with any help!
![58B246BE-FA46-465B-BE4E-A177683DCF0F.jpeg 58B246BE-FA46-465B-BE4E-A177683DCF0F.jpeg](https://www.reef2reef.com/data/attachments/3597/3597583-56076568f345c53faf54167eae472775.jpg)
- 350L/90 gallons, 8 months old mixed reef tank (sps/lps)
1 Tang Desjardini
3 ocellaris
1 lyretail Anthia
1 cardinal banggai
1 whip-fin wrasse
1 cleaner shrimp
1 Hepatus
CUC: hermits
Temperature: 25.5 - 26.5 °C ( 78 - 79ºF)
pH: 8.1
Salinity / specific gravity: 1025
Ammonia: 0.0 Nitrite: 0.0
Nitrate: 5.0 Phosphate: 0.04
Alk: 8.4
Aquaforest reef salt (20% monthly WC)
I’ll be thankful with any help!
![47D9CE9A-0B9E-4C40-98B2-24090A7BA658.jpeg 47D9CE9A-0B9E-4C40-98B2-24090A7BA658.jpeg](https://www.reef2reef.com/data/attachments/3597/3597582-b1bb5f6cd9e8080bd44efe961b5c4731.jpg)
![58B246BE-FA46-465B-BE4E-A177683DCF0F.jpeg 58B246BE-FA46-465B-BE4E-A177683DCF0F.jpeg](https://www.reef2reef.com/data/attachments/3597/3597583-56076568f345c53faf54167eae472775.jpg)