Sudden death of various fish (info / opinions)

[alexkid]

Well,

After a few years it looks like I finally lost my first few fish, and it hurt badly this time.

My wife called me and informed me a day ago that she noticed no movement from my Sailfin-Tang and Brown Powder tang and a smaller yellow coral goby.

When I got home I quickly removed the fish and inspected them thoroughly, there were no abnormal bloating / puss / tears / bites.

Changes in tank

Introduction of new corals including the following

- Frogspawn
- Bubble Coral
- Galaxea Coral
- Pink Tip Anemone
(possibly few more corals) these added in the last month

The corals are doing exceptionally well so this was very disturbing to me, I ran tests and my water parameters are in check.

The only different maintenance I have done as of recently is adding a lot more trace minerals + calcium. I will honestly say I added a bit much and at times did this in the morning when the lights had not been activated by the timers.

ideas ? Suggestions ?

 

[JHemdal]

The first question that comes to mind is: did all the fish die, or did some survive? I think you already understand that if there was something substantially wrong with your water quality, the corals would have shown it first.

If most/all of the fish died, and none of the invertebrates did, it is a virtual certainty that you experienced an epizootic of some sort. Amyloodinium probably is the biggest culprit of this becuase the symptoms can be missed more easily than say, Cryptocaryon....

Jay Hemdal