Exo-Terra Turtle Clean - Biological Turtle Habitat Cleaner helps reduce maintenance by metabolizing waste in gravel, power filters, decorative features and on the interior surfaces of turtle habitats. Turtle Clean rapidly reduces organic waste resulting from feeding (turtles are messy feeders), turtle waste and skin and shell shedding. Turtle Clean also helps control odours and provides turtles with an improved aquatic habitat. Regular application will assist in competitively excluding undesirable bacteria. DOSAGE: span>5 mL per 38 L (10 U.S. gal)Use this dose at initial set-up and as a weekly treatment.