Seachem Reef Advantage Magnesium Fish & Aquatic Life Reef Water Treatment, 8.8 LbCategory: Advanced ReefSeachem Reef Advantage Magnesium Fish & ; Aquatic Life Reef Water Treatment For more than 30 years, aquarium hobbyists have turned to Seachem Laboratories for products designed by chemists and biologists. Help your coral thrive with Seachem Reef Advantage Magnesium. This concentrated, blended, ionically balanced magnesium source is a blend of magnesium, chloride, and sulfate salts formulated to restore depleted levels of magnesium with minimal impact to the ionic ratios found in natural sea water. It contains no ammonia. Ingredients: magnesium sulfate, sodium chloride Guaranteed Analysis: Magnesium (Mg)(min) 80 mg Instructions: BEGINNER: Use 5 g (1 level teaspoon) per 80 L (20 gallons) twice a week. Dissolve in at least 250 mL (1 cup) of freshwater. For precise dosing, use the Seachem Digital Spoon Scale. ADVANCED: Check magnesium level, then follow addition regimen above until magnesium is adjusted to 1,200?1,350 mg/L. Each 5 g/80 L will raise magnesium by about 5 mg/L. Amount or frequency can be adjusted, but do not exceed 25 g/80 L per day. Thereafter, use as required to maintain magnesium. EXPERT: After determining the magnesium depletion rate, set up a continuous drip system. Use the following formula to determine how much to add to your top-off water: g=vm/80 (g=grams to add to top off water, v=volume of tank in liters, m=amount to raise magnesium in mg/L). For ex le, if you want to raise magnesium by 10 mg/L in a 200 liter tank, then you would add (200x10)/80=25 g into the top-off water. [For reference: 1 gallon=3.8 liters, 5 g=1 teaspoon]. Notes: Use the Reef Status:? Magnesium, Carbonate & ; Borate test kit to check magnesium levels. DO NOT OVERDOSE: Excess magnesium may enhance the loss of carbonate alkalinity. Do not directly mix with any carbonate supplement. Best if magnesium & ; carbonate additives are added on alternate days or at least 30 minutes apart. Slight clumping of this product may be encountered but does not impact its use any clumps will break up very easily.