CrystalClear, 4.5 LB, ParaSalt, Formulated To Increase Koi & Goldfish Electrolytic Intake & Controlling Common Parasites, Electrolytes Are Critical In Building & Maintaining A Healthy Slime Coat, Electrolytes Such As Potassium Are Essential In Wound Repair & In Times Of Heavy Stress, During Water Changes Or Clean Outs, Excellent For Mucous Production When Healing From A Wound, Safe For All Aquatic & Domestic Animals.