Dieing SPS

[reefermadness]

Originally Posted by whatcaneyedo

I guess I should have asked, when you say they go white do you mean they're bleaching or is the flesh disappearing to reveal the white skeleton underneath?

Very important question.........these are two very different ball games. Another very important question is how long these SPS have been established? If they are fairly new....well that changes my answer as well because some SPS just do not do well in a captive reef.

Originally Posted by fishytime

I doubt very much that old bulbs would cause rtn......maybe loss of color or browning, but not rtn ( if thats whats happening).....your calcium is a bit high and that could be the cause.........whats your Mg at?

I agree that old bulbs will likely not cause RTN....but loss of colour. I dont think calcium would be the culprit though either......alk maybe....either out of wack or not stable. Other possibilities is a nutrient problem or some kind of contaminant in the water.