How to remove Fenbendazole?

[reefslugs]

I recently used Fenbendazole to remove the tiny clove polyps from my tank. It absolutely worked. After treatment I continued running a skimmer. I turned back on the UV sterilizer and added a large amount of carbon in a reactor. It has been four weeks cents the treatment. Now my issues is that the tank has red slim algae. I am afraid to try treat for red slim algae being that it might be too hard on the tank at this time. My second issue is my Zoas look stressed and I tried putting a few snails back in the tank, but in two days they were dead. What is the proper way to remove Fenbendazole?
Before
After
After B

 

[MnFish1]

First - you do not know that fembendazole is still in the tank? Second activated carbon and water changes would be my answer

 

[Randy Holmes-Farley]

I think it will bind nicely to GAC.