Your veterinarian can get the flubendazole for you, or you can order it from Dr. Chas. Harrison who is on the killietalk list. Fluke Tabs or any other good antihelmentic will no doubt work, too.
I have never heard of the flubendazole problems Tyrone mentioned, and most swear it is 100% effective against Hydra.
I have never had to use it, because Hydra are so trivial to kill. Maybe you have a different species, but three low doses of Formalin, two days apart have always cleaned them out of any tank I had a problem in. [You will kill everything else in the tank if you ever try to do it in one overdose, but the Hydra will then come back.] Formaldehyde combines with tank mulm to become inert in a couple of days, so water changes aren't even needed.
Control consists mostly of depriving them of any live foods, as that's all they can eat. Blooms of Hydra always are following overfeeding of small live foods. They are usually introduced on plants, and not with most live foods.
Wright
01 760 872-3995
805 Valley West Circle
Bishop, CA 93514 USA
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