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Sudden problems with montipora corals
Anyone know of something other than predators, which causes montipora to react badly to but not acropora (or at least, montis are reacting sooner).
I've noticed that most (but not all) of the montipora in my tank is looking bleached out, polyps withdrawn (or gone), etc. At first I noticed it on a "purple" digitata that was in the sand bed temporarily, underneath a light that had gone out. While I would have expected this to result in browning rather than bleaching, I didn't think too much about it. Then I noticed a "cap" that has always been kind of an ugly brown, but which has really taken off in terms of growth, was also looking this way. Also, I placed three frags of a swirling orange cap around my tank, and the smallest sliver had plated over a good couple square inches of rock, and that is now beige and dead-looking, rather than bright orange. The largest piece is still pretty orange, but the edges...where you get new growth...are looking weird...thinner than the rest...I don't know how to explain it. I know I know...I need to pony up some pics. I should also disclose that I've been a bit negligent lately with the water changes, I've run out of GFO and I don't clean my skimmer as often as it needs. So, nitrates are up to about 5 (Salifert) and I now have somewhat detectable phosphates (Salifert) which must mean more are present because even at a measure of 0 I get algae on the glass. This may in fact be the problem (water quality) but I would have expected it to hit my acros first, and most of them look fine. jds |
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