Hi, wondering if someone can help me diagnose my issue. I've lost 3 torch corals over the last few weeks, my tank is approx 2 year old and before 2 weeks ago everything has been fine. All my other corals seem fine and happy (only seems to be my euphyllia)
My parameters:
Calcium 450
Phosphorus 0.03
Magnesium 1400
Alkalinity 8
Salinity 1.0025
Tank size 90litres
I been running a 20% water change weekly for 2 years and test weekly with salifert and hanna test kits.
Light is redsea led 50 running mix of 70% blue and 70% white
I've just dipped one of my last torch corals which seems to be slowly dieing. I've noticed brown buts on the end of the tentacles which didn't come off when I dipped, I'm not sure what that is. Anyone have any ideas?

My parameters:
Calcium 450
Phosphorus 0.03
Magnesium 1400
Alkalinity 8
Salinity 1.0025
Tank size 90litres
I been running a 20% water change weekly for 2 years and test weekly with salifert and hanna test kits.
Light is redsea led 50 running mix of 70% blue and 70% white
I've just dipped one of my last torch corals which seems to be slowly dieing. I've noticed brown buts on the end of the tentacles which didn't come off when I dipped, I'm not sure what that is. Anyone have any ideas?

