I have those, too. I did not find a good way to get rid of them. But I did figure out that my BN pleco eats them as best as I can tell. Otherwise, they still have a good foothold in my house.
http://www.monsterfishkeepers.com/forums/showthread.php?t=376944

http://www.monsterfishkeepers.com/forums/showthread.php?t=376944