Bleached sport on SPS getting larger

[jmowbray]

I have an SPS dominated tank. Let me start by saying the nutrients are high as it's been like 4 months since a WC. I broke my transfer pump and have been waiting to get some cash for a new one (which I know can order). All of a sudden my one SPS colony started getting a dead spot and it's now getting larger. I have no issues with any other SPS colonies. Please see attached pictures. I looked for naudies and can't see anything that would be eating the polyps. Any ideas other then possible nutrients? The tank is just over a year old.

FTS one year ago:

FTS Today:

 

[jmowbray]

No one?

 

[markalot]

No one?

Photos are bad and SPS diagnosis can't really be done just using photos.

What are you params? Have they been steady? KH, Calcium, Salinity, etc?

How are you maintaining Alk? Are you dosing anything on a regular basis in lieu of water changes?

People might be able to respond if more information is given.

 

[moatdaddy]

One thing to always note. If you ask for help. First response will be what is your parameters and equipment.

From the pictures stn, cause completely unknown. Paramters, and equiptment? Also some sps even in prestine tanks dont like captivity or random die. Try to look at the pictures and say yes this obviously shows what I need an experienced eye to see.