very helpful ! I am battling these things right now, !! I am going to the store today to buy what I can find with this info . I oray it works, my worms do not look' like the flat worm, but I have to get rid of them !!!! thanxs for the info !!!

Thanks for the advice. The first dose got rid of 90% of the planaria and it took a few days. I just added a tiny bit more to the water last night to get the last few guys. No change in behavior in the fish or the shrimp. I have also observed the shrimp fry and noticed they were behaving normally. No water changes performed. Kudos to this article and the contributors!

Fenbendazole can be bought as a liquid under the name Panacur or just ask for liquid Fenbendazole It mixes very easily with water. You can get it at a Vet, reptile show or Pigeon/bird supply store . You can also find it through the Internet. I use this stuff for my reptiles as a dewormer.

I've just treated the tank with about 0.15
grams of panacur, the tank's a 25 gallon. I am erring on the side of caution. will it work at this dosage?

This is really interesting. All the sites about tank critters I've come across say hydras are harmless, BUT I always noticed how my apple snails seemed to be 'stung' when they touch/slide over a hydra. I've seen it close up; I have had lots of hydra in my tanks. Sometimes the snails got a little swelling on their antennae where they touched the hydra that went down after a few days.

Hmm, if it hurt an apple snail... think of what it could do to a sensitive little shrimpy?

I dont actually have hydra anymore. I had so many so I just scraped the glass everyday, which pretty much got rid on them? It might of been other things too. Now I have HUNDREDS of copepods/ostracods, little white wormy things, and some planaria.