Seachem Reef Advantage Magnesium Tanks & Bowls Onyx Sand™ provides an advantage

Onyx Sand™ provides an advantage to any plants able to utilize bicarbonates

Chemical filter media contains premium grade carbon

Strainer cage protects impeller and assures continuous suction

High quality

then into harmless nitrate to help prevent fish loss in your tank

Seachem Reef Advantage Magnesium Tanks & Bowls Onyx Sand™ provides an advantageReef Advantage Magnesium is a concentrated (80,000 ppm) optimized blend of magnesium, chloride, and sulfate salts designed to restore depleted levels of magnesium with minimal impact to the ionic ratios found in natural sea water. Reef Advantage Magnesium contains no ammonia. This is a common contaminant in every liquid magnesium supplement on the market. Severely depleted levels of magnesium (below 800 mg L) can cause depressed pH levels and an