temperature? My temperature is stable day and night at 76.5 F.
The OP used this carbon for years without problem before this hapened. I have been using other brand of carbon without problem (seachem), in fact, I never had any problem with my corals or reef since the beginning 2 years ago.
Too much light? No I doubt it in my case since it hapened during the night and there was no change of ligth previously either. My 250 watt Phoenix 14 has been there for 4 months and corals were thriving, acropora growing 1" per month previous to the addition of carbon.
it's definitly something else.
Dead toll: xenia all gone, bleue haliclona sponges all gone, pink digitata nearly all gone. Orange and purple digitata just fine, birdnest never affected and SPS coming back with great polyp extension but still pale and have lost color. LPS and zoanthids doing great now.
This hapened about 5 days ago and I did 30% water change monday, and 30% water change tuesday...Now corals are coming back. Such drastic water change and the corals are feeling better?? now what nasty stuff was in my tank that could have caused this? Only thing I could do is to have this carbon analyzed. Or do another test in another tank with corals I don't really care for.
Previous to the addition of the carbon, the evening I replaced the Seachem carbon by the Kent, all my corals were doing fantastic. Xenia were pumping, I had awesome polyps extention as usual. The only thing that hapened is the kent carbon, no change in temperature, PH, etc...no change in the dosing. I tested for salinity, alkalinity and mag and all were as they are usually. Maybe a bad batch of carbon? If it is a coincidence, then it is a very strange one...if it is a coincidence then what could have caused this? No other factors were present. This hapened overnight, no light involved in the event. No PH or temperature swing either.
I have been using Seachem carbon for 2 years.
Quote:
Originally Posted by paddyob
I used Kent for years and years. Mo bleaching. Ever.
Temperature and too much light are usual suspects.
Highly doubt it's the carbon.
Bleaching is usually human error in tanks.
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