Chalice dying around edges
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Randy Holmes-Farley
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How are other corals in the tank doing?
Randy Holmes-Farley
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Why? He is already well above the natural seawater level of magnesium at 35 ppt, where corals thrive in the ocean and in many aquaria.
Randy Holmes-Farley
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Then it is very unlikely to be any sort of chemistry issue unless this one is special in some way (is newer, older, never gets direct feeding when others do, etc.)
Anything pick on it? Anything possibly sting it, such as at night?
Pcreefer
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It's been on the same spot ever since i got it and it's been doing great 1year plus there's another chalice 6 " away from it and it's doing great nothing seems to be stinging it and it's happening all the way around the chalice I'm just puzzled
It's needs are not being met, it's telling you that by the gentle receding taking place. It doesn't look stung at all. It needs either an improvement in nutrients (don't know what you nitrates or phosphates are at--high, normal or low), lights (don't know if it is getting more or less shading because of either other coral growth or reaquascaping) or flow ( don't know if flow is significantly diminished because of other coral growth or if your pumps or power heads need cleaning).
So after checking nitrates and phosphates and confirming your not getting chloramines from your water changes, I'd move your chalice to a different spot where you think light and flow will be more to its liking.
Whatever has changed in your tank, needs to be corrected. Hopefully you are correct about your parameters and you have reasonably confirmed them. Happy corals thrive, this one is obviously diminishing.
Sometimes a coral can be the canary in the mine and other times, it's slow demise is specific to itself. It's difficult to determine what's going on in one's own tank let alone in someone else's tank where one is unfamiliar with their maintenance, testing, and abilities at day to day observation and evaluation. The chalice looks very salvagable, good luck with the problem solving
So after checking nitrates and phosphates and confirming your not getting chloramines from your water changes, I'd move your chalice to a different spot where you think light and flow will be more to its liking.
Whatever has changed in your tank, needs to be corrected. Hopefully you are correct about your parameters and you have reasonably confirmed them. Happy corals thrive, this one is obviously diminishing.
Sometimes a coral can be the canary in the mine and other times, it's slow demise is specific to itself. It's difficult to determine what's going on in one's own tank let alone in someone else's tank where one is unfamiliar with their maintenance, testing, and abilities at day to day observation and evaluation. The chalice looks very salvagable, good luck with the problem solving
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oldsaint
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A few hours after the lights go out, check that the Euphyllia next to it isn't stinging it. Even if the chalice has been next to it for a while. I've seen streamers 7-8 inches long from them.
