I have a SPS dominated reef tank tha has grown chaeto well for years. Recently it has stopped growing and even receeded. The tank paramaters are carefully monitored and SPS growth is good with 17 small colonies not having current issues. Normally conditions below grow chaeto fast to medium growth. During issue I replaced older Kessil A 360 with new light Kessil A360 Refugium light. I have on growth option and 50% output at 200-300 par.
Alk - 8.5
Ca - 425
Mg =1350
Phosphate - 0.19 Hana
Nitrate - 8 ppm Hana
During issue I did have new Kessil on bloom instead of growth but have since turned light back to growth setting.
Chaeto is a dense dark green that almost looks vegitative or just staining itself. It generally grew typical fluffy sprials that were easily disposed of biweekly.
I have tried Chaetogro as an Iron suppliment and a few lps were not happy about it and disconitumed it's use. Aside from low iron the bloom mode may have caused the chaeto to stop growing. I am at point I may toss current batch out and start again in a month. I dose BRS TWO Part, Some kalk at night and use a weekly bit of Tropic Marin Reef Actif recently after chaeto slowed down. Remained of chaeto is crumbling a bit.
I may just assume bloom mode damaged it and start over with new handful next month.
Any suggestions aside from iron suppliment would be appreciated.
Alk - 8.5
Ca - 425
Mg =1350
Phosphate - 0.19 Hana
Nitrate - 8 ppm Hana
During issue I did have new Kessil on bloom instead of growth but have since turned light back to growth setting.
Chaeto is a dense dark green that almost looks vegitative or just staining itself. It generally grew typical fluffy sprials that were easily disposed of biweekly.
I have tried Chaetogro as an Iron suppliment and a few lps were not happy about it and disconitumed it's use. Aside from low iron the bloom mode may have caused the chaeto to stop growing. I am at point I may toss current batch out and start again in a month. I dose BRS TWO Part, Some kalk at night and use a weekly bit of Tropic Marin Reef Actif recently after chaeto slowed down. Remained of chaeto is crumbling a bit.
I may just assume bloom mode damaged it and start over with new handful next month.
Any suggestions aside from iron suppliment would be appreciated.