Lab Ca Plus 2 L — Ultra Concentrated Liquid Calcium for Reef - Aquaforest

Aquaforest Lab Ca Plus 2 L — concentrated liquid calcium for reef tanks

The Lab Ca Plus 2 L is the concentrated high-performance version of Aquaforest's calcium solution, built for established reef tanks with elevated consumption. Its concentration lifts calcium more sharply per dosed volume than standard Ca Plus — more calcium per ml, but a lower daily cap to avoid precipitation. The 2 L bottle delivers several months of autonomy on a mid-to-large reef.

Part of the Aquaforest Lab range, it slots into the Ca+ / KH+ / Mg+ method or replaces the calcium leg of classic Balling with concentration and precision.

Key difference Lab Ca Plus vs standard Ca Plus

• Concentration: 10 ml of Lab Ca Plus lifts Ca by about 20 ppm in 100 L, vs 15 ppm for standard Ca Plus.
• Tighter max dose: 10 ml/100 L/day for Lab vs 20 ml/100 L/day for standard — concentration demands caution.
• Extended autonomy: same effect at lower dosed volume, so one bottle lasts longer.
• Lab positioning: the range for precise hobbyists managing parameters down to the ppm.

Aquaforest Lab official dosing

• Starting dose: 5 ml per 100 L of tank water per day.
• Measurable effect: 10 ml lifts Ca by 20 ppm in 100 L.
• Maximum dose: 10 ml per 100 L per day — strict ceiling.
• Add zone: high-flow area to prevent local precipitation.
• Testing: after 5-6 h for a stabilized Ca reading.

Specifications

• Brand: Aquaforest (Poland) — Lab range
• Format: 2 L bottle
• Type: concentrated liquid calcium solution
• Compatibility: 100-500 L reef tanks with steady consumption

Why choose Aquaforest at ReefSolution

• Ca Plus 250 ml — the standard version for nano or first trial before Lab commitment.
• Lab KH Plus 2 L — the concentrated alkalinity to dose alongside.
• Lab Mg Plus 2 L — the magnesium that completes the Aquaforest Lab trio.

Frequently asked questions

Can I switch from standard Ca Plus to Lab Ca Plus without transition?

Yes, provided you immediately cut the dosed volume in half. Since Lab is twice as concentrated, the same amount would double the effect. Fine-tune over a week with successive tests to dial in the exact dose.

How long does a 2 L bottle last on a 300 L tank?

At 5 ml/100 L (15 ml/day on 300 L), the 2 L bottle covers 133 days (about 4.5 months). At the 10 ml/100 L max dose (30 ml/day), duration drops to 66 days.

Should I add chloride offset with Lab Ca Plus?

Like any chloride-based calcium supply, Lab Ca Plus injects Cl⁻ into the tank. Long-term, ionic balance holds if you complement with Reef Mineral Salt or with water changes that refresh the balance. On a closed tank with no water changes, Reef Mineral Salt becomes essential.