Red Sea Reef Foundation B — KH/Alkalinity (500 mL / 16.9 fl. oz.)
Transform Your Tank with Rock-Solid Alkalinity Stability
Looking for a precision-formulated alkalinity supplement that keeps your reef rock-solid stable? Red Sea Reef Foundation B is a hobbyist staple at The Coral Boutique, trusted by reef keepers who understand that vibrant coral growth starts with bulletproof KH stability. This 500 mL bottle is sized perfectly for nano and mid-sized reef systems running manual or automated dosing.
Reef Foundation B is a high-purity liquid carbonate and bicarbonate buffer complex formulated to maintain stable alkalinity — arguably the single most important parameter for healthy SPS, LPS, and softie growth. Corals build their skeletons by combining calcium with carbonate, so when KH swings, coral tissue stresses, polyps retract, and STN/RTN risk climbs. Red Sea recommends keeping alkalinity between 7.0–8.5 dKH, with the lower end (7.0–7.5 dKH) often producing the cleanest coral coloration in low-nutrient, SPS-focused systems. Reef Foundation B is part of Red Sea's complete Reef Care Program, designed to be dosed alongside Foundation A (Calcium) and Foundation C (Magnesium) to keep all three core parameters in true balance. Ready-to-use straight from the bottle — no mixing, no stock solutions — it works equally well with manual dosing or a dosing pump for the kind of consistency your corals reward you for.
Key Benefits
- High-purity liquid carbonate and bicarbonate buffer complex
- Promotes strong, healthy coral skeletal growth across SPS, LPS, and softies
- Stabilizes alkalinity to prevent the parameter swings that stress corals
- Supports vibrant coloration in low-nutrient, SPS-dominant systems
- Ready-to-use formula — no mixing required, no stock solution needed
- Ideal for both manual dosing and automatic dosing pumps
- Part of the complete Red Sea Reef Care Program for balanced reef chemistry
- Concentrated formulation — efficient dosing for nano and mid-sized reefs
Quick Stats & Dosing Guide Product Name: Red Sea Reef Foundation B — KH/Alkalinity Manufacturer: Red Sea Size: 500 mL (16.9 fl. oz.) Active Ingredients: Carbonate and bicarbonate buffer complex Form: Ready-to-use liquid supplement Target Alkalinity Range: 7.0–8.5 dKH (best coloration around 7.0–7.5 dKH in low-nutrient systems) Dosing Rate: 1 mL raises alkalinity by 0.05 meq/L (~0.14 dKH) in 100 liters (25 gallons) Recommended For: Reef aquariums up to 500 liters (125 gallons) Best Practice: Dose according to measured alkalinity uptake using Red Sea's Foundation Pro multi-test kit Compatibility: Works alongside Reef Foundation A (Calcium) and Reef Foundation C (Magnesium) for complete balance Best For: Reef keepers running mixed reefs, SPS-dominant systems, or any saltwater aquarium where precise alkalinity control matters Directions: Test alkalinity levels regularly. Add directly to a high-flow area of the sump or display, or use with a dosing pump. Always dose Foundation A and B at least 30 minutes apart to avoid precipitation.
Why Buy From The Coral Boutique?
At The Coral Boutique, we stock only the supplements and additives we trust on our own systems. Red Sea's Reef Foundation B is a long-standing favorite in the saltwater aquarium hobby because it delivers the kind of alkalinity stability that grows healthier, better-colored corals over the long haul. Every product on our shelves is tested, vetted, and backed by reefers who actually use it — so you can buy with confidence.
