Seachum Reef Complete

Ultra-Concentrated Ionic Calcium Blend with Magnesium and Strontium

​Maintain pristine, ocean-like water chemistry in your marine aquarium with Seachem Reef Complete®. As a highly concentrated, optimized liquid blend of ionic calcium, this formula delivers a staggering 160,000 mg/L of bioavailable calcium straight to your tank.

​Unlike standard calcium chloride supplements that can hiddenly introduce toxic ammonia into your closed ecosystem, Reef Complete is uniquely blended to a slightly higher pH. This structural shift forces any structural ammonia to harmlessly gas off into the atmosphere before packaging. Additionally, it contains carefully proportioned amounts of magnesium and strontium to prevent chemical fallout and ensure complete skeletal fortification for your corals.

​Key Features & Benefits

​Industry-Leading Concentration: Features 160,000 ppm of pure ionic calcium, making it roughly 45% more concentrated than its closest major industry competitor.

​Proportional 3-in-1 Element Blend: Includes magnesium and strontium scaled specifically to match the typical consumption ratios of thriving corals (100:5:0.1, Ca:Mg:Sr).

​Purified Ammonia-Free Formula: Expertly engineered to guarantee zero ammonia introduction, protecting your sensitive reef inhabitants from chemical shock.

​Maintains Neutral pH Impact: Restores and sustains ideal natural calcium levels without aggressively throwing off or crashing your existing baseline pH values.

​Halts Coral Tissue Decline: Rapidly remedies critical calcium deficiencies that cause skeletal erosion, stalled growth, and tissue recession in hard corals.

​Technical Specifications

Chemical Form Liquid Ionic Calcium Complex (160,000\text{ mg/L})

Guaranteed Analysis Calcium: 155–160 mg/g | Magnesium: 8 mg/g | Strontium: 0.1 mg/g

Primary Target Ions Calcium (Ca^{2+}), Magnesium (Mg^{2+}), Strontium (Sr^{2+})

Available Sizes 100 mL, 250 mL, 500 mL, 2 L, 4 L

Complementary Products Reef Builder (Carbonate) or Reef Carbonate

Targeted Application & Dosing Instructions

​Because Reef Complete is highly concentrated, it must be used with care alongside an active testing routine:

​Beginner Dose: Add 1 capful (5 mL) per 20 US Gallons (80 L) twice a week. Check your overall calcium levels every two weeks and scale accordingly.

​Advanced Adjustments: Each 5 mL dose per 20 gallons of water will raise your total aquarium calcium levels by approximately 10 mg/L (ppm).

​Daily Dose Ceiling: You can safely adjust the frequency for high-demand SPS coral systems, but do not exceed 12.5 mL per 20 gallons per day.

​Chemical Pairing Rule: Never mix this product directly with a carbonate/alkalinity supplement in the same container or dosing cup. To prevent precipitation, dose them into separate areas of the tank or wait at least 30 minutes between additions.