hi, a fish in my 10 gallon has caught ick and because i do not have an isolation tank i have to dump the medicine directly in the tank. This wouldnt bother me but i have a red claw crab in that tank. I was told that ick meds can kill crustaceans so i decided to remove him from the tank. He is currently in one of those small cups chain stores keep bettas in. i put a little bit of gravel in and filled it with tank water. the ick medicine i am using is "Nox-ick" is it safe for crabs? because he looks so sad and scared in the little clear cup. How long will he last in the cup with no heating and no filtration?