[mayanjungledog]

I notice that this thread is over a year old, but it was linked to from a different forum. Great information! Thank you for the great advice on hydra / planaria eradication. I noticed hydra in my 10 gallon RCS and tiger shrimp tank recently, but was a little hesitant to try fenbendazole because I have one month old baby otocinclus and MTS in the tank. After a couple of weeks of debate, I took the plunge and tried it last night. I've seen a range of doses, and I decided to go conservatively. I used liquid Panacur, which is a 100 mg/ml suspension. I used a dose of 25 mg (0.25 ml) per 10 gallon, mixed it in about a cup of tank water, then used a syringe to apply the diluted mixture to the affected plants and glass directly. The water turned cloudy pretty quickly, and the hydra almost immediately went limp. It is now about 15 hours later and the water is crystal clear again and most of the hydra are gone. There are a few hydra still attached to the glass, but they're limp and hanging upside down. There are no casualties as of yet (I'm knocking on wood). Baby otos, shrimps and MTS are all as happy as can be. I am not sure if I should re-dose in a few days or a week or so, or if this one low dose is adequate for complete eradication. I'm going to wait another 12 - 24 hours to see what happens. We shall see...