New "invert" in my fw tank

[Batt4Christ]

Saw a planaria in my tank just quick enough to see an angelfish eat it. But that's nothing-

My "newest" I vert in the tank:

I believe it is a hydra.

 

[jetajockey]

yep thats hydra. Best thing I've used to kill both planaria and hydra is fenbendazole, a light sprinkle of panacur or safe guard (dog dewormer) does the trick. Couple of big water changes in the following days. I've used this in fry tanks with snails and shrimp and have not seen any ill effects.