I am thinking about getting a Columbian Shark,I heard they need salt,I was wondering if this would be good , Aquarium Pharmaceuticals Aquarium Salt ?...heres the description ..An all natural salt, made from evaporated sea water. Helps improve gill function to reduce stress. Reduces electrolyte loss, promotes healthy gill function and temporarily blocks nitrite toxicity. Contains the seven electrolytes necessary to maintain healthy freshwater fish. Can be used with most aquarium remedies to improve recovery from disease. Use as directed with each water change....Does that sound ok?