Reef aquarium care · KM-001
Reef Calcium Refill
Made for reef keepers
Calcium maintenance, made simpler.
A practical dry refill for reef keepers who prepare their own calcium solution. Fill the supplied bottle as directed to prepare 500 mL, without paying to ship ready-made liquid.
| Product code | KM-001 |
|---|---|
| Made for | Reef aquarium calcium maintenance |
| Ingredient | Calcium chloride dihydrate |
| Format | Dry calcium refill |
| Net contents | 300 g |
| Bottle size | 500 mL preparation bottle |
| Prepared volume | 500 mL calcium solution |
| Prepared strength | Approximately 160,000 mg/L calcium |
What you receive
One preparation bottle containing a measured 300 g dry refill. Fill the bottle as directed to make 500 mL of calcium solution. Water is not included, keeping the parcel lighter and reducing leakage risk in transit.
Why reef tanks need calcium
Hard corals and coralline algae use calcium as they grow. Regular testing shows whether your aquarium is consuming calcium and helps you make measured corrections without unnecessary dosing.
Preparing and dosing
- Read the complete directions before opening the refill.
- Add suitable water in the order and volume stated on the label.
- Allow the bottle to cool fully before final preparation and use.
- Follow the supplied dosing table, then retest your aquarium.
The table below assumes the full refill has been prepared to a final volume of 500 mL, producing approximately 160 mg of calcium per mL.
| Target increase | 100 L aquarium | 250 L aquarium | 500 L aquarium |
|---|---|---|---|
| 5 mg/L | 3 mL | 8 mL | 16 mL |
| 10 mg/L | 6 mL | 16 mL | 31 mL |
| 20 mg/L | 13 mL | 31 mL | 63 mL |
Test first, make adjustments gradually and retest. These figures are a dosing reference for the prepared solution, not instructions for correcting an aquarium without testing.
Use and care
- Test your aquarium water before deciding whether calcium adjustment is needed.
- Keep the bottle tightly closed and dry until preparation.
- Read the preparation directions before adding water.
- The bottle becomes hot during preparation; allow it to cool completely before use.
- Never add the dry refill directly to your aquarium.
- Keep out of reach of children and animals.
Need help?
Plain-language safety information is available online. Complete preparation directions and safety documentation will be available before checkout is opened.