50 gram
Use 200 mg of Safe™ (included scoop) per each 200 L (50 US gallons) as needed to reduce chlorine and chloramine or per 50 L (13 US gallons) for ammonia.
All other sizes
Use 1.25 g (1/4 tsp.) for every 1,250 L (300 US gallons) as needed to reduce chlorine and chloramine or use 1.25 g (1/4 tsp.) for every 300 L (75 US gallons) for ammonia.
NOTE: These directions supersede all other prior packaging.
May be added to aquarium directly, but better if added to new water first. If adding directly to aquarium, base dose on aquarium volume. For exceptionally high chloramine concentrations, a double dose may be used safely. To detoxify nitrite and nitrate in an emergency, up to 4 times normal dose may be used. If temperature is > 30 °C (86 °F) and chlorine or ammonia levels are low, use a half dose.