Flat Worms

[Reef_Ready]

Looks like I have a bad case of flat worms in my 15gal nano. For quite a while I thought the little 1mm square things were a type of brown algae, but they are definately flat worms.

I siphon out a substantial amount when I do my weekly water changes but they still seem to be gaining. They are mostly on the sand and don’t seem to be affecting the corals… at least not yet.

Any recommended ways to eliminate these guys?