Cichlid Lake Salt, 4 kg / 8.8 lbs Replicates The Natural Environment Of All Rift Valley Lake African Cichlids A Chemically Sound Blend Of Salts Designed To Replicate The Natural Environment Of Cichlids Contains all physiologically essential elements such as magnesium, potassium, calcium, and sodium Also Contains Trace Elements Such As Iron, Aluminum, And Iodide; Does Not Contain Harmful Or Unnecessary Elements Such As Nitrates And Arsenic 250 Grams Treats Up To 675 Gallons