Hydra

[msjinkzd]

common snails can survive the dewormer, apple snails and nerites (fancy snails if you will) likely will not.

 

[timwag2001]

Where did you get this information from about the Fenbendazole? I had hydra in my Assassin Snail tank with a ton of MTS/pond/ramshorns and cherry red shrimp and they are all fine.

It is a 10 gallon, I got one packet used a very small amount like those mcdonalds ketchup cups, I do about 1/4 of the bottom add water than stir. Than dump it in the filter.

If you been sucking up hydra, that just means you sucked up only the ones you saw. They are very elusive and best to treat the whole tank.

heres an article that notes a nerite death
http://www.arizonainverts.com/articles/UseofDewormer(Fenbendazole).html