Hey, I wondered if anyone would help shed some light but I have a Fish Only 55 Gallon setup, with a Fluval 405 and five large pieces of live rock. Its been running now for about 2 months.
In the tank there are two Black & White Ocellaris Clownfish, A long nosed Hawkfish, a brown Hawkfish and a Valentini Puffer and up until this morning a juvenile Emporer Angelfish. Sadly this morning he was dead drapped across a rock! Last night he was absolutely fine, he was eating fine, breathing normally and swimming around as normal. This morning dead.
I did an ammonia the night before and it read 0.25.
Really anoying as really liked him!