waste of $$$ & time...just us LR or LS or uncooked cocktail shrimp to cycle a tank...or were you talking about the liquid stuff you add that treats the water & adds protective slime coat supposedly also help reduce stress to the fish??? if so, THAT stuff will treat the water for chlorine & such & may or may not coat the fish, but it WILL make your skimmer go crazy for up to a week...