Amyloodinium? Sad day

I lost my Flame Angel this morning. Yesterday at the morning feeding (10AM) he was fine with good color and eating, then last night as I was cleaning the intakes on the powerheads (around 10PM) I noticed that he had what I thought were bubbles or sand stuck to him. As I was stirring a lot of junk up I decided to wait a few hours and watch- I didn't see him again until 3AM (insomniac) when I found him sand surfing but still breathing, covered in white spots. I scooped him out and dropped him into a hypo bath @82F 1.010sg. Color faded out in patches, gills bright red. Needless to say it was too late; the two other fish are MIA.

Given how fast it nailed him I'm thinking amyl and not ich-

The only recent changes have been dosing phyto every other day the last three weeks and the addition of 6 blue leg hermits two weeks ago, everything has been going great, good params, good growth from the inverts normal feeding, etc. with the exception of a cyano bloom that I keep trying to vacuum up and a little GHA on the green stars.

Question 1) Should I go invert-only for a month or nuke the tank?
2) Apart from not having formalin on hand, did I treat correctly?
3) Is there some way to mitigate this in the future?

TIA

 

Bummer....

 

Im willing to bet the phyto is what caused an outbreak Amyloodinium. I had a similar situation last year or the year before with cyclopeeze. It was a total loss as a result. You overfed phyto like I did with cyclopeeze thus producing a lot of excess micro food that fed the dinoflagelettes. The dino's (Amyloodinium) went after your fish once the tank was overrun with them. Thats what happened to me.

 

Interesting- and crap! You'd think the stuff would come with a warning!

 

Im sorry for your loss GeejEx. Hey geek, how often where you dosing the phyto? I dose once every 3-4 days and keep the skimmer running. Luna

 

I was dosing every other day with the suggested amount, then cut that in half when I started to get some diatoms on the sand. Left the skimmer running the whole time. I reduced the lighting period for a few days to try to get the cyano/dia under control.

 

I never heard of phyto doing so much damage, was this "live" phyto?

 

since there was no answer luna, I'll say I use marine snow about every 5 days or so. I unplug my return pump and let the cls push it around for about an hour and then I turn the pump back on and let the skimmer have it. Works great for me as I have never even seen dyno