My dad has a big pond and at one time there was so much algae it was like pea soup, so we heard about this straw business and decided to give it a go, you can buy little packages for it i think but we just got a big bad and put as much straw in it as we could, that cleared a lot of it up. but not all so maybe it only gets rid of really bad algae in the water (i.e not on the pumps or whatever) and unless you use a bad with fine mesh then i suspect a lot of straw would fall out and fall to the bottom of the tank, i guess its worth a try.
Sam