hole in deresa

[Afish4u]

I had this picture from 2 weeks ago. I saw 2 spots like this. Later on what ever this was fell off.... I think. Then it left a white spot behind.

http://www.thereeftank.com/photopost/data/509/14044clamguy.JPG
http://www.thereeftank.com/photopost/data/509/14044clamguy.JPG

today I found a hole in the mantle. Do you just have an idea as to what it is?

[superman]

Good question, I am not sure, but if you don't get an answer here you can go to Marine Depot forum and post the pic to be looked at by Anthony Calfo who should be able to help you.

[Afish4u]

Thank you for the info.

[Afish4u]

Anyone else? I have more of these spots and lines?