Hi all,
I've had my 29g biocube running for almost a year now and have lately had a hard time with my hammer and frogspawn corals. They were the first corals I had started with and were doing beautifully for the past 5 months or so - growing and fully extended. Within the last month they have both been receding and part of the skeleton is now visible. I have other corals in the tank that are doing just fine (torch, palys, zoas, dendro, gonipora, leathers, and mushrooms). I have been checking my parameters regularly to see if something has changed, but can't find anything different or off. I do a regular water change/media change every two weeks, and there's no sign of disease. I can't figure it out.
In response to the receding I lowered their position in the tank to closer to the sandbed thinking the lights were too strong (I changed to LEDs from the standard biocube LED/tube lights in June by retrofitting my canopy with the TruLumen Pro Nano kit: Marine Fusion – 12K white & 453nm blue; Deepwater Blue – 453nm blue). Lowering the corals did not lead to any improvement.
Corals seemed to be doing fine until roughly late Sept/Oct though.
My params have been regularly around these:
Alk = 8.5
CA = 435
Mg = 1370
pH = 7.8-8.2
Phosphate = .03
Nitrite = 0
Nitrate = ~10
Salinity = 1.026
Temp = 76
Any ideas? I really want to try to stop the receding! Thanks in advance for any advice. The photos show the hammer and frogspawn in July and then today!
I've had my 29g biocube running for almost a year now and have lately had a hard time with my hammer and frogspawn corals. They were the first corals I had started with and were doing beautifully for the past 5 months or so - growing and fully extended. Within the last month they have both been receding and part of the skeleton is now visible. I have other corals in the tank that are doing just fine (torch, palys, zoas, dendro, gonipora, leathers, and mushrooms). I have been checking my parameters regularly to see if something has changed, but can't find anything different or off. I do a regular water change/media change every two weeks, and there's no sign of disease. I can't figure it out.
In response to the receding I lowered their position in the tank to closer to the sandbed thinking the lights were too strong (I changed to LEDs from the standard biocube LED/tube lights in June by retrofitting my canopy with the TruLumen Pro Nano kit: Marine Fusion – 12K white & 453nm blue; Deepwater Blue – 453nm blue). Lowering the corals did not lead to any improvement.
Corals seemed to be doing fine until roughly late Sept/Oct though.
My params have been regularly around these:
Alk = 8.5
CA = 435
Mg = 1370
pH = 7.8-8.2
Phosphate = .03
Nitrite = 0
Nitrate = ~10
Salinity = 1.026
Temp = 76
Any ideas? I really want to try to stop the receding! Thanks in advance for any advice. The photos show the hammer and frogspawn in July and then today!
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