tissue necrosis question...

[flipteg]

i bought a small acropora frag last Saturday... it is about 2 inches tall and 2 inches across with around 12 stalks...

when i got home, i immediately noticed that there is a part between the stalks that does not have tissue... it's just white... the price tag at the petshop indicates that they have gotten this coral on May 12... i've went back to look at this coral around 3 times in the past 10 days before i bought it...

when i got home, i also tested the petshop's water and it was less than ideal.. nitrates is at around 12.5mg/l and calcium is only at 245ppm...

the tissue recession does not look like it has gotten any worse since i bought it but then again, i've only had for 2 days... i was just wondering if this should be any cause of concern...

 

[clkwrk]

If it looks like the tissue around the dead spot is loose then yes its a concern if it looks good and tight then it was a little stn from lack of flow or light . As long as it doesn't continue to spread you should be fine. I have recovered a few colonies that were stn'd heavily On had 20% tissue left and now it has grown over everything back to 100% tissue.