Calcium+, KH/Alkalinity & Magnesium (Foundation A/B/C). Pack of 250ml X 3

Maintain Reef Stability With Calcium+ KH Alkalinity Foundation A/B/C by Red Sea

Keeping a reef aquarium stable becomes more challenging as coral growth increases. The Calcium+ KH Alkalinity Foundation A/B/C Pack by Red Sea provides a balanced approach to maintaining calcium, alkalinity, and magnesium levels in reef systems of all sizes. This 3-part supplement system supports coral skeletal development while helping maintain long-term chemical stability inside the aquarium.

The pack includes three separate 250 mL solutions designed to work together as part of a complete reef care routine. Each formula targets one of the major foundation elements consumed daily by corals and other calcifying organisms.

What Is Included in the Foundation A/B/C Pack?

This bundle contains:

• Foundation A — Calcium+
• Foundation B — KH/Alkalinity
• Foundation C — Magnesium

Together, these supplements help maintain the core elements responsible for coral growth, coloration, and structural development.

Foundation A — Calcium+ Support

Calcium plays a major role in skeletal formation for SPS corals, LPS corals, clams, and coralline algae. As coral colonies mature, calcium consumption rises quickly, especially in densely stocked reef systems.

Foundation A helps replenish calcium levels to support:

• Coral skeletal growth
• Coralline algae development
• Long-term reef stability
• Healthy calcification

The concentrated formula allows small daily adjustments without excessive dosing volume.

Foundation B — KH and Alkalinity Stability

Alkalinity fluctuations can stress corals and lead to inconsistent growth patterns. Foundation B helps stabilize carbonate alkalinity while supporting pH consistency throughout the aquarium.

Maintaining proper alkalinity levels helps:

• Reduce parameter swings
• Support coral growth
• Improve reef stability
• Buffer against sudden pH changes

Stable alkalinity becomes especially important in SPS-dominated systems with higher daily consumption rates.

Foundation C — Magnesium Balance

Magnesium supports the relationship between calcium and alkalinity inside reef aquariums. Without proper magnesium levels, maintaining balanced calcium and KH parameters becomes much harder over time.

Foundation C helps support:

• Efficient calcium uptake
• Stable reef chemistry
• Coral skeletal development
• Long-term dosing balance

This supplement also helps prevent unwanted precipitation issues common in heavily dosed systems.

Simple Dosing for Daily Reef Maintenance

The Foundation A/B/C system was designed to simplify reef supplementation without overcomplicating daily maintenance routines. Each formula includes straightforward dosing instructions based on aquarium water volume and testing results.

Dosing concentrations:

• Foundation A: 1 mL raises calcium by 2 ppm in 100 liters (25 gallons)
• Foundation B: 1 mL raises alkalinity by 0.1 dKH in 100 liters (25 gallons)
• Foundation C: 1 mL raises magnesium by 1 ppm in 100 liters (25 gallons)

Routine testing and gradual adjustments help maintain stable reef chemistry over time.

Designed for Mixed Reefs and SPS Systems

The Calcium+ KH Alkalinity Foundation A/B/C Pack works well for:

• Mixed reef aquariums
• SPS coral systems
• LPS-dominated reefs
• Frag tanks
• Coral grow-out systems

As coral demand increases, maintaining stable foundation elements becomes one of the most important parts of successful reef keeping.

Why Reef Hobbyists Use Red Sea Foundation Supplements

Many reef keepers prefer the Foundation system because it offers:

• Balanced 3-part supplementation
• Concentrated formulas
• Easy daily dosing
• Reliable parameter support
• Reef-specific formulations

The use of high-purity ingredients also helps maintain cleaner water chemistry in sensitive reef environments.