Algae eater?

siamese algea eater eat almost every type of algea. Make sure its the real one before you get it though. Oto Cats also eat those i think.

Ghost shrimps usually live in my tank for about 2-3 weeks before they are completely killed off everytime i add them, i got about 40+ of them each time i went to the lfs; haven't seen them eat algae yet, only those food crumbs that reach the tank bottom.