Switch off the flash. Get your lighting right. Take the photo and post
them.

Then we might be able to help.

"white fuzzy blobs growing on 4
pieces of live rock" is not much to go on...

~m

"hhhh" wrote in message
. ..
Hello,
I am re-setting up a 180g tank. I put new substrate and put the live
rock I had back in it. It has been running for 2 months with one fish
(Big Eye) and 24 hermits, 24 snails. I am seeing white fuzzy blobs
growing on 4 pieces of live rock. I am not sure if these are sponges or
what. I have tried to take photos and just see the flash.
How can identify these things?