Can I Put Cat Wormer In My Fish Tank?

Can I Put Cat Wormer In My Fish Tank? Expel-P is a levamisole HCL-based medication that is effective in safely and effectively deworming ornamental fish. Expel-P also acts as an immunostimulant agent. Expel-P is very safe and is effective against many internal parasites, especially nematodes, when used as directed. How do you treat an aquarium