Dosing Elements
Calcium reef supplement for coral growth
Nereus Calcium Supplement is a clean reef supplement (calcium chloride) for reef aquarium two-part systems. Mix to your target concentration and automate delivery with the Nereus Dual-Head Doser so calcium stays in step with alkalinity consumption — especially on SPS-dominated tanks.
Corals pull calcium as they build skeleton. When Ca falls behind, growth slows and alk/Ca balance drifts. A dedicated calcium reef supplement keeps replenishment predictable and pump-safe.
Why reefers choose this reef supplement
- Clean calcium source for SPS, LPS and mixed reefs
- Dissolves for scheduled, automated dosing
- Built to balance with Nereus Alkalinity and Magnesium reef supplements
- Supports stable Ca readings alongside live controller data
- Premium presentation suited to international aquarium brands
How to use
- Dissolve in RODI water to your chosen two-part strength in a clean mixing vessel.
- Ensure the solution is fully clear before it enters tubing or pump heads.
- Use a dedicated calcium reservoir and dosing line — never share with alkalinity.
- Begin with a modest daily dose and raise only after testing calcium (and alkalinity) responds as expected.
- Split additions across the day with the Dual-Head Doser for gentler parameter control.
Best practice
- Maintain magnesium in range so calcium and alkalinity stay soluble and easier to balance.
- Avoid large single dumps; gradual automation is kinder to livestock.
- Test Ca regularly on high-growth reef systems and keep a dashboard history.
- Store powder dry and sealed; remix if a stock solution crystals or settles unusually.
Paired with an alkalinity reef supplement and routine testing, Nereus Calcium Supplement keeps the second half of the classic reef equation under control.