Join Date: Sep 2010
Location: West Hollywood, CA
What kind of critters are in your tank? If you have shrimp and fish, turning the filter on is going to be inevitable. For the Panacur to do its job it will need to be in your tank for days to weeks depending on what you're trying to kill.
Unless you redo your tank afterwards, no matter how much carbon you add to your filter, in my experience you will never remove the Panacur from your substrate. That's the bad news. The good news is that the only critters this would affect are nerite snails. Once you use Panacur they won't survive in your tank unless you replace your substrate and redo the tank. Shrimp and other snails are unaffected by small amounts of Panacur.