Each 200 gallon box of AccuraSea1 synthetic seawater mix contains 4 bags precisely weighed  to produce 45 gallons of seawater at a specific gravity of 1.026 or 50 gallons at 1.024. AccuraSea1 is a superior formulation made with high purity anhydrous salts and packaging that makes it simple to produce a precise seawater solution every time. At a salinity of S=35 it produces the following target parameters: calcium 420 mg/l, alkalinity 8 dKH, magnesium 1300 mg/l, strontium 8 mg/l, potassium 400 mg/l.