Black mollies clear it! I bought 4, and they cleared my 6ft tank in
about 5 mins. They just go to the surface and pump. Make sure you only
get females unless you want hundreds of em.
You can still end up with hundreds of them, even if you only get females.
Chances are, they're already pregnant when you buy them. And they can have
several litters from a single mating.
Only get males, then you'll be safe.
Leigh
http://www.fortunecity.com/lavender/halloween/881/