Has anyone ever had fluconazole kill a fish? My Moorish idol that I've had for approx. 9 months suddenly appeared dead today. He has otherwise appeared healthy. He was definitely eating yesterday afternoon, his color looked great, he was active and swimming normally and briskly. Everything that goes into the tank goes through quarantine (TTM +prazi +metro or a 60+ day invert quarantine). I haven't changed anything other than dosing fluconazole (4000mg total guesstimated 20mg/gal Reef Flux though might be slightly higher than 20 depending on actual water volume which is a Red Sea 750 that has a total volume of 200g and a co-plumbed 25g lagoon) Friday afternoon and a 50g water change with my normal Red Sea blue bucket before the fluconazole. Yet here we are mid Sat and the idol was sucked up against the powerhead dead. Other fish look fine, corals look fine. It just came as a huge shock as he has looked super healthy and eats great then bam.... Any other thoughts then? I wondered if maybe this was unusual enough of a fish that people hadn't tested one.
Other parameters:
SG: 1.026 (calibrated refractometer)
pH: 8.26 (Apex probe)
Alk: 8.0 (Hannah)
Phos: 0.03 (Hannah)
Ammonia: 0 (API, yes, I know. I won't buy more when it's empty)
Nitrate: 0 or super close to it (API)
Ca: 350 (Red Sea, lower than I'd anticipated)
Mg: 1120 (Red Sea)