Reeflowers Effective Dechlorinator Fish Aquarium Water Conditioner, 17-fl oz bottle

Add 1/2 tsp (2 mL) per 26 US gallons (100 liters) of tap water to be treated. This should be increased to 2 tsp (10 mL) for every 26 us gallons (100 liters) of tap water for new tank set ups or when doing large water changes. It is not recommended to use tap water for reef aquariums, but using Effective Conditioner can help with reef fish stress by using 1/2 tsp (2 mL) per 26 US gallons (100 liters) of R/O or premixed saltwater. In case of emergency, the dosage can be increased to 4 tsp (20 mL) per 26 US gallons (100 liters).

85 ml bottle - 20 drops = ~1/4 tsp (1 ml) 250 ml, 500 ml & 1000 ml bottles - 1 cap = ~1 tsp (6 ml) 3000 ml bottle - 1 cap = ~6 tsp (30 ml)