Birdsnest issues

[scottwhitson]

Hello all,

We are having some issues with two out of four birdsnests that are in our tank. They are losing tissue from the bottom up very slowly and the "birds of paradise" may have stopped receding. We have tried moving the pink one to a different spot and nothing has changed. ALL other SPS are doing great. The "birds of paradise" only started losing tissue after I epoxied it to the rock so that may be why it receded a little.
http://i154.photobucket.com/albums/s246/sandswhitson/IMG_0428.jpg
http://i154.photobucket.com/albums/s246/sandswhitson/IMG_0431.jpg
http://i154.photobucket.com/albums/s246/sandswhitson/IMG_0426.jpg

[TRENT_G]

Anyone know what causes this???

[iap]

Have you tried testing your water?

[returnofsid]

Anyone know what causes this???

Typically, low Alkalinity or extremely high alkalinity.

[Car147]

Yup Low Alk or big swings in Alk.

[MrKite24]

Are you dosing vodka or biopellets?

[TRENT_G]

Typically, low Alkalinity or extremely high alkalinity.

Not my post but thanks. I may also be having this issue. Just noticed a small white blotch at the bottom of mine? I'll do a water test today. Thanks