I had my actinic bulb burn out on me and I am thinking it was never very bright to begin with, with my new bulb my tank looks amazing and my zoas did for a couple days.
With my old bulb
With my new bulb
Could the lighting be the issue or could something be eating them?
My parameters aren't perfect but nothing has changed in 2 months which is as long as I have had the zoas, everything else is happy.