on another forum some one was having the same prob but with a diff fish this is what was suggested to them to try and i trust the person who said try it know them for a long time. was even told it works good to kill planeria and wont harm shrimp
"The 1st thing I would try is treating the fish with levamisole. It's not rough on the fish, it's highly effective on ALL worm type parasites, and it works FAST.
Treat the infected fish for 72 hours with your lights OFF. If after 3 days it looks 100% cured and starts gaining weight then I would treat the entire tank it was in when you noticed the issue and consider the issue solved.
It will knock down every single planeria in a tank and not so much as daze a shrimpette."