Seachem sells the same garlic extract (with the added value of vitamin c addition) in an 8 oz bottle for less than half the price of other manufacturers' 1 oz. Bottle. Garlic is safe for all fish and there is no danger of overdose. Directions shake well before use. Soak food in garlicguard before feeding. For enhanced effectiveness against inch and other parasites use Seachem's focus and metronidazole as follows add 1 measure of metronidazole to 1 measure of focus per tablespoon of frozen food. Completely soak this food mix in garlicguard, refrigerate and feed once or twice daily for 1-2 weeks.