From your picture it looks as though the colony was losing flesh from the inside out. Is this correct? Was the cyano there before or after the colony started to die?
If it was dying from the inside out, it's not getting enough flow. If it's outside in, then too much flow. I wouldn't worry too much about blasting it. It needs to be pretty intense for that. Once I figured out my birdsnest I started putting it about 8" from a hydor K3. That was the happiest colony I had... and it grew from a 1" frag from a dying colony to bigger than a melon in less than 6 months. So save a frag!
|