Tropic Marin Sea Salt, 25 kg Bucket, White, Powder, Aquarium Salt

Directions To achieve a salinity level of 32-35 ppt (psu), dissolve 35 ml (approx. 37-40 g / 1.3-1.4 oz.) of the sea salt for every litre or 0.5 cup (approx. 140-150 g) for every US-gallon of water in a container. The resulting seawater is ready for use as soon as the salt is completely dissolved and the solution is clear. A weekly, partial water change, replacing 10% of the total water volume with saltwater prepared with the product, will help to maintain the water quality.