<nav role="navigation" class="site-navigation">
  <ul class="site-nav__items"><li class="site-nav__item" >
        <a href="https://sraquaristik.com" class="site-nav__link" >Home</a></li><li class="site-nav__item site-nav--has-dropdown" >
        <a href="/collections" class="site-nav__link" >Product Categories</a><div class="site-nav__dropdown text-left d-position-left" style="width:250px;">
            <div class="site-nav__dropdown-inner"  style=""><div class="clearfix"><ul class="row row-20"><li class="column col-p-100 col-auto" ><div class="row row-20"><div class="col-12 col-lg-12">
      <ul class="submenu"><li>
            <a href="/collections/aquarium-auto-top-off" class="site-nav__link">Aquarium Auto Top Off</a></li><li>
            <a href="/collections/aquarium-maintenance-and-accessories" class="site-nav__link">Aquarium Maintenance and Tools</a></li><li class="site-nav--has-dropdown">
            <a href="/collections/aquarium-decor-and-hardscape" class="site-nav__link">Aquarium Rock and Driftwood</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/decorative-wood" class="site-nav__link">Decorative Wood</a></li><li>
        <a href="/collections/rock-and-stone" class="site-nav__link">Rocks, Stones, and Pebbles</a></li><li>
        <a href="/collections/saltwater-reef-rock" class="site-nav__link">Saltwater / Reef Rock</a></li><li class="site-nav--has-dropdown">
        <a href="/collections/wysiwyg" class="site-nav__link">WYSIWYG</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/wysiwyg-woods" class="site-nav__link">Wood</a></li><li>
        <a href="/collections/wysiwyg-rocks" class="site-nav__link">Rock / Stone</a></li><li>
        <a href="/collections/wysiwyg-combo" class="site-nav__link">Complete Aquascapes</a></li></ul></li></ul></li><li class="site-nav--has-dropdown">
            <a href="/collections/aquariums-and-cabinets" class="site-nav__link">Aquariums, Terrariums, and Cabinets</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/aquarium-kits" class="site-nav__link">Aquarium Kits</a></li><li>
        <a href="/collections/aquarium-table" class="site-nav__link">Aquarium Table</a></li><li>
        <a href="/collections/glass-aquariums" class="site-nav__link">Glass Aquariums</a></li><li>
        <a href="/collections/gfrc-cement-aquarium-stands" class="site-nav__link">GFRC (Cement) Aquarium Stands</a></li><li>
        <a href="/collections/marine-plywood-aquarium-stands" class="site-nav__link">Marine Plywood Aquarium Stands</a></li><li>
        <a href="/collections/table-top-aquarium-stands" class="site-nav__link">Table Top Aquarium Stands</a></li><li class="site-nav--has-dropdown">
        <a href="/collections/deco-tanks-parts-and-accessories" class="site-nav__link">Parts and Accessories</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/deco-tanks-parts-and-accessories" class="site-nav__link">Deco Tank 15</a></li><li>
        <a href="/collections/deco-tanks-parts-and-accessories" class="site-nav__link">Deco Tank 25</a></li></ul></li></ul></li><li>
            <a href="/collections/co2-systems-and-accessories" class="site-nav__link">CO2 Systems and Accessories</a></li><li class="site-nav--has-dropdown">
            <a href="/collections/filter-media" class="site-nav__link">Filter Media</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/4-standard-round-filter-socks" class="site-nav__link">4” Standard Round Filter Socks</a></li><li>
        <a href="/collections/7-standard-round-filter-socks" class="site-nav__link">7” Standard Round Filter Socks</a></li><li>
        <a href="/collections/filter-media-products" class="site-nav__link">Filter Media Products</a></li><li>
        <a href="/collections/fine-filter-media-bags" class="site-nav__link">Fine Filter Media Bags</a></li><li>
        <a href="/collections/rectangle-filter-socks-for-sra-sumps" class="site-nav__link">Rectangular Filter Socks for SRA Pumps</a></li></ul></li><li>
            <a href="/collections/food-and-feeding" class="site-nav__link">Food and Feeding Accessories</a></li><li class="site-nav--has-dropdown">
            <a href="/collections/lighting" class="site-nav__link">Lighting</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/freshwater-plant-lighting" class="site-nav__link">Freshwater / Plant</a></li><li>
        <a href="/collections/saltwater-reef-lighting" class="site-nav__link">Saltwater / Reef</a></li></ul></li><li class="site-nav--has-dropdown">
            <a href="/collections/live-plants" class="site-nav__link">Live Plants</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/air-plants" class="site-nav__link">Air Plants</a></li><li>
        <a href="/collections/bromeliads" class="site-nav__link">Bromeliads</a></li><li>
        <a href="/collections/bunched-aquarium-plants" class="site-nav__link">Bunched Plants</a></li><li>
        <a href="/collections/novelty-plants" class="site-nav__link">Novelty Plants</a></li><li>
        <a href="/collections/portion-plants" class="site-nav__link">Portion Plants</a></li><li>
        <a href="/collections/potted-aquarium-plants" class="site-nav__link">Potted Plants</a></li><li>
        <a href="/collections/terrarium-terrestrial-plants" class="site-nav__link">Terrarium Plants</a></li><li>
        <a href="/collections/tissue-cultured-aquarium-plants" class="site-nav__link">Tissue Culture Cups</a></li></ul></li><li class="site-nav--has-dropdown">
            <a href="/collections/luminariums" class="site-nav__link">Luminariums</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/luminarium-aquarium" class="site-nav__link">Aquariums</a></li><li>
        <a href="/collections/luminarium-terrarium" class="site-nav__link">Terrarium</a></li><li>
        <a href="/collections/luminarium-replacement-parts" class="site-nav__link">Parts and Accessories</a></li></ul></li><li>
            <a href="/collections/planted-aquarium-water-treatment" class="site-nav__link">Planted Aquarium Water Treatment</a></li><li class="site-nav--has-dropdown">
            <a href="/collections/pumps" class="site-nav__link">Pumps</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/dc-pump-replacement-parts" class="site-nav__link">DC Pump Replacement Parts</a></li><li>
        <a href="/collections/water-and-skimmer-pumps" class="site-nav__link">DC Water Pumps</a></li></ul></li><li class="site-nav--has-dropdown">
            <a href="/collections/reverse-osmosis-systems-and-accessories" class="site-nav__link">Reverse Osmosis and Accessories</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/3-stage-compact-ro-and-replacement-filters" class="site-nav__link">3 Stage Compact RO System</a></li><li>
        <a href="/collections/4-stage-ro-di" class="site-nav__link">4 Stage RO / DI</a></li><li>
        <a href="/collections/5-stage-ro-di" class="site-nav__link">5 Stage RO / DI</a></li><li>
        <a href="/collections/10-ro" class="site-nav__link">10” RO</a></li><li>
        <a href="/collections/20-filters" class="site-nav__link">20” Filters</a></li><li>
        <a href="/collections/plumbing-and-additional-accessories" class="site-nav__link">Plumbing and Accessories</a></li></ul></li><li class="site-nav--has-dropdown">
            <a href="/collections/saltwater-filtration-and-support-systems" class="site-nav__link">Saltwater Filtration and Support Systems</a><ul class="drilldown site-nav__dropdown"><li>
        <a href="/collections/bio-pellet-reactors" class="site-nav__link">Bio Pellet Reactors</a></li><li>
        <a href="/collections/calcium-reactors" class="site-nav__link">Calcium Reactors and Kits</a></li><li>
        <a href="/collections/co-regulator-kits-and-systems" class="site-nav__link">CO2 Regulators</a></li><li>
        <a href="/collections/complete-saltwater-reef-filtration-kits" class="site-nav__link">Complete Saltwater Reef Filtration Kits</a></li><li>
        <a href="/collections/water-and-skimmer-pumps" class="site-nav__link">DC Water Pumps</a></li><li>
        <a href="/collections/dosing-systems" class="site-nav__link">Dosing Containers</a></li><li>
        <a href="/collections/sumps" class="site-nav__link">Filter Sumps</a></li><li>
        <a href="/collections/media-reactors" class="site-nav__link">Media Reactors and Kits</a></li><li>
        <a href="/collections/ph-control" class="site-nav__link">pH Control</a></li><li>
        <a href="/collections/skimmers" class="site-nav__link">Protein Skimmers</a></li><li>
        <a href="/collections/saltwater-filtration-accessories" class="site-nav__link">Parts and Accessories</a></li></ul></li><li>
            <a href="/collections/water-testing-and-accessories" class="site-nav__link">Water Testing and Accessories</a></li><li>
            <a href="/collections/water-treatments-reef-supplements-for-saltwater" class="site-nav__link">Water Treatments / Reef Supplements for Saltwater</a></li><li>
            <a href="/collections/water-treatments-for-freshwater" class="site-nav__link">Water Treatments for Freshwater</a></li><li>
            <a href="/collections/refurbished" class="site-nav__link">Refurbished</a></li><li>
            <a href="/collections/gift-cards" class="site-nav__link">Gift Cards</a></li><li>
            <a href="/collections/merchandise" class="site-nav__link">Clothing and Apparel</a></li></ul>
    </div></div></li></ul></div></div>
          </div></li><li class="site-nav__item site-nav--has-dropdown" >
        <a href="/pages/instruction-manuals" class="site-nav__link" >Instructions and Manuals</a><div class="site-nav__dropdown text-left d-position-left" style="width:250px;">
            <div class="site-nav__dropdown-inner"  style=""><div class="clearfix"><ul class="row row-20"><li class="column col-p-90 col-auto" ><div class="row row-20"><div class="col-12 col-lg-4">
      <ul class="submenu"><li>
            <a href="/pages/calcium-reactor-instruction-manual" class="site-nav__link">Calcium Reactor Setup Guide</a></li><li>
            <a href="/pages/co2-expansion-module-instruction-manual" class="site-nav__link">CO2 Expansion Module Instruction Manual</a></li><li>
            <a href="/pages/co2-regulator-kit-assembly-instruction-guide" class="site-nav__link">CO2 Regulator Kit Assembly Instruction Guide</a></li></ul>
    </div><div class="col-12 col-lg-4">
      <ul class="submenu"><li>
            <a href="/pages/compact-reverse-osmosis-system-assembly-instruction-guide" class="site-nav__link">Compact Reverse Osmosis System Assembly Instruction Guide</a></li><li>
            <a href="/pages/dc-water-pump-user-manual" class="site-nav__link">DC Water Pump User Manual</a></li><li>
            <a href="/pages/halcyon-ro-di-installation-information" class="site-nav__link">HALCYON - 4 Stage RO DI System Installation Information</a></li></ul>
    </div><div class="col-12 col-lg-4">
      <ul class="submenu"><li>
            <a href="/pages/halcyon-5-stage-professional-grade-system-installation-information" class="site-nav__link">HALCYON - 5 Stage Professional Grade/Store Use RO DI System Installation Information</a></li><li>
            <a href="/pages/pro-skim-80-instruction-manual" class="site-nav__link">Pro Skim 80 Instruction Manual</a></li><li>
            <a href="/pages/smart-automatic-top-off-instruction-manual" class="site-nav__link">Smart Automatic Top Off (ATO) Instruction Manual</a></li></ul>
    </div></div></li></ul></div></div>
          </div></li><li class="site-nav__item" >
        <a href="/blogs/news" class="site-nav__link" >Blog</a></li></ul>
</nav>

Cart0

Reef Supplements

Maintaining the correct balance of alkalinity, calcium and magnesium in your reef aquarium is extremely important for the health and well-being of your corals. Save thousands of dollars per year by mixing your own reef supplements, using our quality reef supplements

Reef Supplements

Calcium Booster Liquid Supplement (Part 1)

KH Alkalinity Liquid Buffer Supplement (Part 2)

Magnesium Liquid Supplement (Part 3)

Alkalinity KH Booster Concentrated Supplement

Calcium Chloride Supplement (CaCl 2) Concentrated

Kalkwasser (Calcium Hydroxide) Reef Supplement

Magnesium Chloride Concentrated Supplement

Magnesium Sulfate Supplement

Coral Defense