Originally Posted by melosu58
I would be interested in what the ammonia and nitrites are.
The nitrite levels are 0, I have ordered an ammonia testing kit but it hasn't yet arrived. That said I did a water change as soon as I removed the dead fish so readings won't reflect the levels at time of death.
All the other fish are fine so far so I'm not sure if ammonia is to blame. The harlequin that died was always more faded in colour than the others and was my smallest male. I want to believe he was simply weaker (wishful thinking I suppose)