Seachem Reef Advantage Calcium 500gm
Reef Advantage Calcium™ is a non-caustic (pH 8.3–8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are essential to all coral growth. If either becomes deficient, coral growth will cease, followed by a rapid decline in coral health.
Reef Advantage Calcium™ also includes magnesium and strontium in amounts proportionate to typical utilization ratios (100:5:0.1, Ca:Mg:Sr). This allows one to maintain these two important elements while maintaining calcium. Unlike limewater (kalkwasser), Reef Advantage Calcium™ does not have a caustic pH and will not deplete magnesium. Used as directed, it will not deplete alkalinity.
Directions
Beginner
Use 5 g (1 level teaspoon) per 150 L (40 US gallons) twice a week. For precise dosing, use the Seachem Digital Spoon Scale. Dissolve in at least 250 mL (1 cup) of freshwater. Check calcium every 2 weeks and adjust amount or frequency accordingly.
Advanced
Check calcium level (use Reef Status™ Calcium to test magnesium levels), then follow addition regimen above until calcium is adjusted to 380–420 mg/L. Each 5 g/150 L will raise calcium by about 12 mg/L. Quantity or frequency can be adjusted, but do not exceed 10 g/150 L per day. Thereafter, use as required to maintain calcium.
Expert
After determining the calcium consumption rate, set up a continuous drip system. Use the following formula (or skip the math and use our Dosage Calculator) to determine how much to add to your top-off water: m=vc/400 (m=grams to add to top off water, v=volume of tank in liters, c=amount to raise calcium in mg/L). [For reference: 1 gallon=3.8 liters, 5 g=1 teaspoon].
DO NOT OVERDOSE: Excess calcium may enhance the loss of carbonate alkalinity. Do not directly mix with any carbonate supplement. Best if calcium & carbonate additives are added on alternate days or at least 30 minutes apart.
Sizes
250g, 500 g, 1 kg, 4 kg
SHOP ONLINE WITH CONFIDENCE
For full delivery & returns details, please refer to our Shipping & Returns page.
FREE SHIPPING* Free shipping applies on nearly all products across our website with Australian shipping addresses only. Customers living in rural areas or purchasing bulky/fragile items are advised to reach out first before ordering. Offer cannot be applied to previous purchases or the purchase of gift cards and cannot be redeemed for cash. Offer cannot be used in conjunction with any other discounts. Orders will arrive to destinations within 3-7 business days where possible, with Authority To Leave only. If you do not wish to use this delivery method, other chargeable methods will be available at checkout.
CLICK & COLLECT Local Pickup is available for all South Australian customers only. Customers can visit our Edwardstown warehouse during business hours to pick up their orders. Simply choose the Local Pickup option at checkout and we will email you when your order is ready. Local pickup purchases made outside of SA will be automatically refunded.
