
Seachem Reef Calcium
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Quick answers
- What do buyers say about the Seachem Reef Calcium?
- Rated 5 out of 5 from 2 ratings.
- Where can I buy the Seachem Reef Calcium?
- 5 stores we checked sell it, including Tropical Treasures Wyo LLC, Amazon, SaltwaterAquarium.com, The Hidden Reef, Walmart.
Seachem Reef Calcium prices at every store
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- Tropical Treasures Wyo LLCCheck price at Tropical Treasures Wyo LLC
- AmazonCheck price at Amazon
- SaltwaterAquarium.comCheck price at SaltwaterAquarium.com
- The Hidden ReefCheck price at The Hidden Reef
- WalmartCheck price at Walmart
Seachem Reef Calcium price history
Lowest price we've seen: $11.33 on Oct 31 at SaltwaterAquarium.com. Tracked across 4 stores since Oct 31.
From Tropical Treasures Wyo LLC
- Contains 50,000 mg/L of bioavailable calcium as a polygluconate complex
- Supplies calcium plus an easily metabolized organic component for calcifying reef organisms
- Designed to maintain calcium after the aquarium has reached the appropriate range
- Polygluconate complexation helps reduce calcium precipitation and unnecessary alkalinity loss
- Does not alter pH and does not intentionally add nitrate or phosphate
- May be paired with Reef Complete or Reef Advantage Calcium
- Sizes
- 500 mL
- Materials
- Calcium gluconate in a polygluconate complex; 50,000 mg/L calcium
- Fit
- Saltwater and reef aquariums; best for SPS, LPS, mixed reef, soft-coral systems with calcifying organisms, and marine aquariums with clams
- Sizing
- Standard dose of 5 mL per 20 US gallons raises calcium by about 3 mg/L; calculate dosing from actual water volume after accounting for rock, sand and equipment;
- Care
- Shake before use. Add 5 mL per 20 US gallons twice weekly to an area with good water movement; do not exceed 15 mL per 20 gallons in one day; avoid pouring dire
- Shipping
- Shipping calculated at checkout; live fish are no longer shipped and livestock is in-store pickup only
- In the box
- 500 mL bottle of Seachem Reef Calcium
About the Seachem Reef Calcium
Seachem Reef Calcium 500 mL is a concentrated organic calcium supplement formulated to maintain calcium availability and support coral growth in saltwater reef aquariums. It contains 50,000 mg/L of bioavailable calcium supplied as a polygluconate complex.
Unlike traditional ionic calcium supplements based on calcium chloride, Reef Calcium uses an uncharged organic calcium complex. This allows corals to obtain multiple calcium atoms along with an easily metabolized source of energy while using less energy than may be required for the uptake of charged ionic calcium.
Reef Calcium is intended primarily for maintaining calcium that is already within an appropriate range. It may be used by itself or alongside an ionic calcium supplement as part of a complete reef aquarium calcium and alkalinity routine.
Key Features
Concentrated Organic Calcium: Contains 50,000 mg/L of bioavailable polygluconate-complexed calcium
Supports Coral Growth: Supplies calcium and an easily metabolized organic component for calcifying reef organisms
Designed for Calcium Maintenance: Helps maintain calcium after the aquarium has reached the appropriate range
Minimal Alkalinity Depletion: Polygluconate complexation helps reduce calcium precipitation and unnecessary alkalinity loss
Does Not Alter pH: Maintains calcium without functioning as a pH-adjusting supplement







