Hey everyone,
I’m reaching out for help with a sudden issue in my mixed reef tank. Over the past 48 hours, I’ve noticed rapid tissue loss on a few SPS colonies — mainly Acropora and one Montipora digitata. The tissue is peeling off quickly from the base upwards, and some polyps look completely retracted or gone. No obvious pests that I can see, and water parameters have been mostly stable:
Flow and lighting haven’t changed recently. The only recent change was adding a new frag from a trusted local reefer (dipped, inspected, and quarantined).
Do you think this is RTN or STN? And what would be the best immediate step — fragging, iodine dip, blackout, or something else?
Appreciate any insight or experience from fellow reefers who’ve dealt with this!
Thanks in advance,
Jake ragdoll hit
I’m reaching out for help with a sudden issue in my mixed reef tank. Over the past 48 hours, I’ve noticed rapid tissue loss on a few SPS colonies — mainly Acropora and one Montipora digitata. The tissue is peeling off quickly from the base upwards, and some polyps look completely retracted or gone. No obvious pests that I can see, and water parameters have been mostly stable:
- Temp: 78.2°F
- Salinity: 1.025
- Alk: 8.6 dKH
- Ca: 430 ppm
- Mg: 1340 ppm
- Nitrates: ~5 ppm
- Phosphates: 0.04 ppm
Flow and lighting haven’t changed recently. The only recent change was adding a new frag from a trusted local reefer (dipped, inspected, and quarantined).
Do you think this is RTN or STN? And what would be the best immediate step — fragging, iodine dip, blackout, or something else?
Appreciate any insight or experience from fellow reefers who’ve dealt with this!
Thanks in advance,
Jake ragdoll hit