Aqua Medic Silicagel Air Dryer Refill 1L Salts & Supplements Reef Advantage Calcium™ also includes

Reef Advantage Calcium™ also includes magnesium and strontium in amounts proportionate to typical utilization ratios (100:5:0

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that offers rapid growth and desirable form

Severely depleted levels of magnesium (below 800 mg/L) can cause depressed pH levels and an inability to maintain proper calcium levels

Remove activated carbon and chemical media before use

Aqua Medic Silicagel Air Dryer Refill 1L Salts & Supplements Reef Advantage Calcium™ also includesSilicagel, dry granulate with high de hydration capacity. The indication pearls changing colour from orange to blue if wet in an ozone booster.