Some mIcro organism is killing my fish

[Jay Hemdal Verified Community Expert]

So what do you recommend? It’s been a coral an invert only system for over 6 months. Trying to reintroduce utility fish back into the tank.

If the display has been fishless for 6 months, just Quarantine the new fish going in.

Current Quarantine Protocol

2024 Quarantine Procedures Jay Hemdal David Scarborough Protozoans (Cryptocaryon/ich, Amyloodinium/velvet) and Metazoan trematodes/flukes are by far the most common parasites found on newly acquired fish. A carefully managed, proactive quarantine process can effectively eliminate these...

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Jay