I've had to put my tank on hold for a while (due to a little accident in my dad's car that I must pay for....

) I've been keeping the parameters stable and such but I can't add anything new. Anyway, the substrate is getitng pretty icky with this brown algae and thin lays across the bottom. I think I need a sand-sifter or something. Right now I have 2 clowns, a yellow tang, a whole bunch of snails, hermit crabs, and an emerald crab. I did have an orange-spotted goby, but he just disappeared after a while... I've decided I can put some money towards something to get my substrate looking better. What should I get?