Calcium precip? Sponge?

[johlert5]

Hello reefers,

I'm new to the hobby and have just over a 2 month old tank. I've got corals & fish and all seem to be doing well.

I did however just notice some white clumps in my overflow. It's not a spot I look often so I'm not sure how long it's been there.

From my searches I'm thinking either calcium precip or sponges? If it's sponges is it best to leave there?

PS. How do you all get clear pictures?!

Thanks!

 

[blaxsun]

It looks more like precipitation, but I could be wrong.