New algae for me?

My 90 gal. is well on its way, it 5 months old now. I have the following live stock:
3 Percula Clowns
1 Lawnmower Blenny
3 Emerld Crabs
10 Blue Leg Hermits
6 Turbo snails
1 Pepperment Shrimp

I ordered from John @ Reef Clearners the following and they should arrive the 16th.
50 Dwarf Cerith
25 Florida Cerith
9 Nassarius Vibex
10 Nerite Snails
5 Red Mangroves
1 Chaeto

My h2o perms are, Temp. 80, Amno. 0, Nrites 0. Nrates 0, SG. 1.024, PH.7.8, Thats all I test for so far.

Here is my question, I have a refug 20 gal. L, w/EV 120 skimmer, I am getting some type of algea in the whole refug. whichs includes the skimmer and return portions. I thought when I first saw it that it small baby snails on the glass. I reached in and it is slimmy and soft like a white/tanish peice of cotton. It is on the glass and the bottom, it is also between the baffles. Out of all the items I am getting from John or at my LFS came I put some CUC in the refug and the skimmer and return?? I know the the Chaeto and Mangroves go in the refug, but i'm asking about the snails and such. And will they clean this up? Thanks

 

"white/tanish peice of cotton" sounds like pineapple sponges. Google pineapple sponges and see if it looks like what you have. If so, don't worry. They are benficial.

Jack

 

I concur.

 

It doesn't look like pineapple sponges. I wish I could get a pic of it.