Interceptor vs. Hermit crabs

[lastlight]

I've done treatment 3 times before. I've been able to catch the hermits quite easily but I think I put them back in too soon. Carbon had been running 24hrs but I still lost 1 or 2 of the 3 I had caught. My porcelains both survived treatments 1 and 2 as I was not able to catch them. Cleaner shrimp survived all 3 as he is very elusive and tough to catch.