Resident Aquarium Nerd
Join Date: Apr 2004
Location: Murfreesboro, TN
Fin rot usually doesn't need to be medicated, it's almost always caused by environmental factors. Fixing the environment and keeping the tank clean should be enough to help the fish heal. I would test your ammonia, nitrite, and nitrate. If you post your tank size and fish that will help, too. Something's amiss here.
If you do medicate, whether or not to remove the lobster is going to depend on what you use. Anything copper-based could kill him but other medications are more mild.
"We weep for a bird's cry, but not for a fish's blood. Blessed are those with a voice."
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