Bought a Yellow tang about 1 week ago. Was doing fine. Had seen him in the aquarium shop a couple of times. Was there for about a month. Woke up this evening (Work nights) and he was dead. I had gone to an Aquarium store yesterday and the owner told me my FOWLR
should be treated like a Reef and I should test the DK and Calcium in addition to the pH, SG
, Amm/Nit/Nit. He also recommended a two step buffer. I retested my water yesterday and the parameters were as follows:
pH 8.3, SG
1.020, Temp 78F DK 7.0, Ca
460, Amm/Nit/Nit 0ppm. I added the buffer as indicated (Into my sump), went to work. the fish were fine this am and the Tang was dead this Pm. Retested pH 8.3, Ammonia/Nitrite/Nitrate 0.
1. Do you think this was related to the buffer or coincidence?
2. Any other thoughts? (None of the fish seemed in distress, no elevated RR, spots etc..).