184g basement 8ft reef

[Roskoreef]

sigh.... more stn issues, fairly certain it was a combo of slight overdose of zeostart, slight change in zeo reactor output (when i changed pump and reactor 2mths ago) and an alk swing from 7 dkh to 8.75 dkh overnight (apex malfunction)

only my largest colonies are dying, i was hoping it would stop but this morning nearly a 1/4 of my large bonsai, yellow mille, efflo and teal deepwater... i dont think i have a choice but to frag out...

I fragged out the teal deepwater and cut most of the dying tissue, but i found this black inside the skeleton, anyone know if this is whats killing my nicest stuff? besides stn from recent issues..

pics after cutting most of the bottom off,



black stuff, was inside the part that was dying,