★★★★★
Good product
C. Rahn—September 30, 2025✓ Verified purchase
Fantastic product. Easy to use, very good instruction and information, and is extremely effective. Read more
Brightwell Aquatics
Brightwell Aquatics - Reef Code B - Balanced Calcium Alkalinity System Water Conditioner - For All Saltwater Marine
$23.72$27.15
About this item
- MULTIPLE COMPONENTS – Reef Code B is a multi-component automatic buffer that regulates pH. Unlike single-component KH products, it offers a two-part dosing method for calcium and carbonates (alkalinity) for a reef aquarium, mirroring the natural seawater ratios, providing a more stable environment
- CARBONATE & MULTI-MINERAL – When used in equal parts with Reef Code A, it maintains the ionic balance of natural seawater. Concentrations of carbonates, bicarbonates, sulfates, borates, and other anions are maintained with minor, and trace minerals crucial for the growth of reef-building organisms
- STRENGTH ADVANTAGE – Reef Code B ensures a more robust and effective performance in maintaining desired reef aquarium conditions. It contains no phosphate, silicate, or organic material, promoting a clean and healthy reef environment
- DIRECTIONS – Shake well before use and test alkalinity prior to dosing. Add 5 ml of the product per 25 gallons of water every other day or as necessary to maintain alkalinity within the range of 7 to 12 dKH. Each milliliter of Reef Code B will raise the alkalinity in 1 gallon of water by approximately 2.22 dKH
- AMERICAN-MADE EXCELLENCE – Brightwell Aquatics is an industry-leading brand committed to providing innovative and scientifically backed aquatic care products. Made in the USA, we consistently deliver advanced superior quality solutions to elevate the vibrancy and health of your aquarium
$23.72
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Product details
| Brand | Brightwell Aquatics |
|---|---|
| Liquid Volume | 2 Liters |
| Item Weight | 1 Pounds |
| Item Form | Liquid |
| Manufacturer | TopDawg Pet Supply |
Technical specifications
| item_weight | 1 Pounds |
|---|---|
| manufacturer | TopDawg Pet Supply |
| item_model_number | RCB2L |
| date_first_available | June 24, 2004 |
| item_package_dimensions_l_x_w_x_h | 8.82 x 6.26 x 2.8 inches |
| item_dimensions_lxwxh | 2.75 x 6.25 x 8 inches |
| brand_name | Brightwell Aquatics |
| target_audience_keyword | algae-eaters, betta-fish, bottom-feeder-fish, cichlid-fish, fish |
| directions | Basic: Shake product well before using. Add 5 ml (1 capful) of product per 25 US-gallons of aquarium water every other day or as needed to maintain the alkalinity within a range of 7 - 12 dKH. When used in this fashion, 250 ml treats up to 1,250 US-gallons (4,732 L). When used in equal amounts with Reef Cōde A, the calcium and carbonates being added are in the same ratio found in natural seawater. Do not mix products in the same container; this will cause the active components to precipitate and become ineffective. Allow 60 seconds to pass between dosing with Reef Cōde A and B. Advanced: Determine the alkalinity in the aquarium using an accurate test kit before supplementing. Shake this product well before each use. Each ml of Brightwell Aquatics Reef Cōde B will increase the alkalinity in 1 US-gallon (3.785 L) of water by approximately 2.22 dKH (0.79 meq/L). If the initial alkalinity in the aquarium is below 7 dKH (2.5 meq/L), add this product at the maximum rate of 5 ml per 10 US-gallons daily until the desired alkalinity is attained, then dose daily or weekly as needed (see below). Note that each aquarium has different requirements for calcium and carbonates (which largely constitute Alkalinity or Buffering Capacity, hence pH-stability); therefore, it is not uncommon for unequal amounts of Reef Cōde A and B to be required for obtaining and maintaining the desired calcium concentration and alkalinity. To determine the daily dosing rate for alkalinity maintenance: estimate the volume of water in the entire aquarium system; divide the daily decrease in alkalinity by 2.22 (when measuring alkalinity by dKH; divide by 0.79 when measuring by meq/L); multiply this number by the volume of water in the system to get the daily dosage required (ml) to maintain a stable alkalinity. Guaranteed Analysis: Alkalinity or Buffering Capacity (min) 8,400 dKH (3,000 meq/L) Caution: Contains carbonate and bicarbonate salts; harmful if swallowed. If swallowed: give water, get medical attention. May cause eye or skin irritation. If in eyes, flush with water for 15 minutes, get medical attention. If on skin, wash thoroughly with water. Keep out of reach of children. Not for human consumption. |
| model_name | Reef Code B |
| color | Cranberry |
| size | 2-Liter |
| age_range_description | All Life Stages |
| number_of_items | 1 |
| included_components | Reef Code B |
| specific_uses_for_product | Behavior |
| product_dimensions | 2.75 x 6.25 x 8 inches; 1 Pounds |
| best_sellers_rank | #33,419 in Pet Supplies ( See Top 100 in Pet Supplies ) #322 in Aquarium Water Treatments |
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Customer reviews
4.7287 ratings
- 5★88%
- 4★13%
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★★★★★
Great buy
Alejandro Garcia—January 31, 2026✓ Verified purchase
Does exactly what it says it will do. No fuss! 100% Read more
★★★★★
Great product
James Pierce—January 30, 2026✓ Verified purchase
Thank you Read more
★★★★★
Works great. My corals love it.
Richard—December 28, 2024✓ Verified purchase
Been using this product for years. My corals love it. Have not changed since this brand works great so sticking with the same formula for my aquarium. I pair they product with reef code a. Read more
★★★★☆
Why isn't this stuff sealed??
Robin R—September 3, 2020✓ Verified purchase
I've ordered the reef code A & B. Both bottles weren't sealed & leaked all over. They were double bagged so I guess it was expected to leak. Read more
★★★★★
Definitely a great carbonate additive
Allen—April 25, 2023✓ Verified purchase
The media could not be loaded. I dose with Kalkwasser for foundational CA/CACO3 needs because I don’t like adding the extra salts required in basically every other CA/buffering tech, but my system is long-passed sustainability on ‘limewater’ alone. But I do find the Brightwell carbonate supplement easily, reliably, and safely bridges the gap. Read more
★★★★★
Alkalinity/dKH Made Stable
Ryan_79—September 7, 2018✓ Verified purchase
Always been using this brand, Brightwell Aquatics. Requires the lowest dosage by volume compared to other good brands on the market as much as I know. Maintains Alkalinity stable, through an automated doser. Had to make a week’s adjustment on my tank’s requires daily dose and finally got it to stabilize. Remember that having a GFO requires more doses of this supplement since Granular Ferric Oxide lowers alkalinity, scrapped my GFO reactor so I use less Alk/dKH additive. Got a lot of macro algae to deal with the Phosphates (PO4) and other nutrients in my tanks’s System. This is the best and the only product I use for Alkalinity adjustments! Read more
★★★★★
great product
eric—July 19, 2019✓ Verified purchase
Brightwell is a great product use nothing else but thier products for reef tank and this is a great price for thier product and last months in my 55 gallon great deal for your buck Read more
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