Something is Eating my Coralinne Algea

See my tank stat and inhabitants in my signature. Nothing has changed in my tank in months. That being said, something has begun to eat the coralline algea. It has turned white where the purple has been eaten away. This has never happened. Ive had the same hermits forever and theyve never bothered it. Any suggestions?

 

Urchins and hermit crabs and eat it. Asterina stars normally leave white dots on purple algae.

 

thats the funny thing, I have no emeralds, no Asterina and no urchins. I have a fromia star but he stays mostly on the glass. Ive had him for 6+ months. I cant think of what could be eating it. My blood shrimp died 5 weeks ago and I replaced him with another ....but Im sure shrimp dont eat coralline ....or ...? Also, the tank suppliments are the same as theyve always been. I check params 2X weekly (I know, OCD) lol ....and Im always on spot with everything.

 

Are you sure it is getting eaten? It can fade and die on its own due to a change in water parameters or light. Have you checked your calc, alk and mag levels? Have you changed your bulbs or lighting fixture?

 

the fixture is 8 months old ....light is 3 months old. my calc alk and mag levels are all within range. (my selenity was a little higher than normal 2 weeks ago, but Ive done a change since then). Im baffeled. Honestly, everything is within good range and nothing has changed. My OC is a hysterical little character ...maybe hes developed an appetite for it (grin).

 

I have hermit crabs and asterina stars and they don't touch the coralline. But I did notice when I added new rocks covered with coralline to my tank that the coralline developed a bunch of white spots (due to the change in water, exposure to air, etc.). It has now recovered. Maybe something upset it, or the light needs replacing...hopefully it will come back on its own.

 

I hope so too. I do notice the white spots after each water change, but its only for a day. Coralline developed in my tank for a 1/2 golf ball sized frag I bought 9 months ago ....the stuff has spread like wild fire, with no additives (purple up, etc). I just dont want it to get munched away.

 

I saw the title of this thread and only though "Lucky!!! I wish ours would disappear too! "

You think it's a bad thing that it's being eaten/dying. Ours is everywhere. :

 

LMAO ...wow ...really?? Ive never heard of anyone being on that end of the spectrum. Having dived on the GBR and seeing it in nature, I cant get enough.