Do you think I have algae?

my snails are green from algae
 
I have it in my Assasin tank on the sponge filter. The pond snails love it. If it gets to be too much I remove some of it and drop it in my 30 gallon with the 5 SAE's. They eat it up like it is candy!

Nice pics!
 
AquariaCentral.com