Tetra® Ick Guard® is a soothing conditioner that quickly clears ick (Ichthyophthirius multiﬁliis), or white spot, on freshwater ﬁsh. Ick is usually the result of sudden changes in the aquarium water temperature or stress. Left untreated, ick spreads rapidly and is usually fatal. Special ingredients have been added to protect ﬁsh from secondary infections. Tetra Fizz Tabs are fast dissolving premeasured tablets that make caring for your aquarium faster, easier, and more convenient.