Brightwell Aquatics Reef Code B
Overview
- The carbonate-bearing component of a two-part method for dosing calcium and carbonates (the substances largely responsible for increasing alkalinity (“buffering capacity”)) in the same ratio as that found in natural seawater.
- Ionically-balanced with respect to natural seawater concentrations of calcium and carbonates when used in equal amounts with Reef Code A.
- Benefits reef-building organisms such as corals, clams, calcareous algae, etc.
- Simplifies calcium and alkalinity maintenance.
- Stronger than most competing products.
- Contains no phosphate, silicate, or organic material.
- Formulated by a marine scientist.
Technical Background
Reef Code B provides the carbonate component in a balanced, ionically-stable formulation designed to match natural seawater ratios when used in conjunction with Reef Code A. This combination supports stable alkalinity and calcium levels essential for coral growth and calcification. The absence of phosphate, silicate, and organic compounds reduces the risk of unwanted biological growth or nutrient imbalances in marine aquariums.
| Component | Specification |
|---|---|
| Calcium & Carbonate Ratio | Matches natural seawater proportions |
| Phosphate Content | 0 ppm |
| Silicate Content | 0 ppm |
| Organic Material | None |
| Formulation Basis | Marine scientist-developed |
FAQ
What is the recommended dosage for Reef Code B?
Please contact customer service
Can Reef Code B be used alone without Reef Code A?
No, Reef Code B must be used in equal amounts with Reef Code A to achieve proper ion balance and alkalinity support.
Does Reef Code B contain any trace elements?
No, it contains no phosphate, silicate, or organic material. It is specifically formulated to avoid nutrient imbalances.

Nicholas Bailey –
Used Reef Code B with Code A for three months. My corals have grown more robustly, and water parameters remain stable. No algae blooms or nutrient issues. Highly recommend for reef tanks.
Keith Ferguson –
The product works exactly as described. Alkalinity stays consistent, and my clams are thriving. No phosphates or silicates detected in testing. Easy to mix and store.
Edward Hemmings –
Good performance in maintaining calcium and alkalinity. Slightly more expensive than some alternatives, but the stability is worth it. Works well with my existing setup.
Phil Robertson –
After switching from a generic supplement, I noticed a significant improvement in coral coloration and growth. The formulation feels more natural and balanced.