Home

Explore

View Cart

Deals

Saved

Suggested searches

Plant-based protein powders
Vegan leather handbags
Bedroom decor
Waterproof jackets
Hoodies

Learn more about how we use your data to personalize your experience and ads. Recommendations are for informational purposes only.

Squeaky's Aquatics

Brightwell Reef Code B alkalinity supplement bottle for reef aquariums

Brightwell Reef Code B alkalinity supplement bottle for reef aquariums

Squeaky's Aquatics

Brightwell Aquatics Reef Code B

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$8.14

Color

Black

Quantity

Product description loading

Product description loading

This is the product description text that will appear here.

Shopping designed around you.

Start selling

For brands

For creators

Build your store

Information

Shop Pay

Help center

Social

X (Twitter)

Instagram

Legal

Terms of Service

Privacy Policy

Your Privacy Choices

Powered by

|

Start selling for free

Language

© Shopify Inc. 2026

Quantity

1

Description

Brightwell Reef Code B is the alkalinity half of Brightwell's balanced two-part calcium and alkalinity system for reef aquariums. Dosed in equal measure with Reef Code A, it supplies the carbonates that make up your tank's alkalinity, or bu...

Delivery & Returns

Returns accepted within 30 days

Exclusions may apply. See full policy

Squeaky's Aquatics

Squeaky's Aquatics

5 (44)

You might also like

Reef Code B - Balanced Calcium & Alkalinity System - Part B - 2 Liter

15% off

Premium Aquatics

Reef Code B - Balanced Calcium & Alkalinity System - Part B - 2 Liter

Aquarium Depot

Brightwell Reef Code A-P Ionically Balanced Powered Calcium & Alkalinity Part A 1000g

Squeaky's Aquatics

Brightwell Aquatics KoralColor – Increased Coloration Biochrome Booster – 250 mL

Aquatic Cove

Brightwell Phosphate -E 250ml

Brightwell Aquatics Reef BioFuel - Enhances Nutrient Uptake

15% off

Premium Aquatics

Brightwell Aquatics Reef BioFuel - Enhances Nutrient Uptake

Squeaky's Aquatics

Brightwell Aquatics MicroBacter7 – Complete Bioculture – 250 ml

Aquarium Depot

Brightwell Reef BioFuel Bioavailable Carbon Source 17oz

Squeaky's Aquatics

Brightwell Aquatics Koral Recover – Botanical Coral Remedy – 125 ml

Brightwell Reef BioFuel - 500ml front of bottle

J&L Aquatics Ltd.

Brightwell Aquatics Reef BioFuel - 500ml

Squeaky's Aquatics

Salifert Calcium Aquarium Test Kit

Ocean Nutrition Betta SPA water conditioner

Squeaky's Aquatics

Ocean Nutrition Betta SPA Water Conditioner

Hydros Aquatics

BrightWell Kalk+2 450g

Squeaky's Aquatics

Waterbox Starter Bacteria

Red Sea Coral Pro Salt Mix 55 gallon bucket for saltwater reef aquariums

Squeaky's Aquatics

Red Sea Coral Pro Sea Salt Mix 55 Gallon Small Bucket (15.4lb)

Fritz A.C.C.R. 4oz water conditioner - ammonia, chlorine, and chloramine remover for freshwater and saltwater aquariums

Squeaky's Aquatics

Fritz A.C.C.R. Water Conditioner 4oz

Aquarium Depot

Brightwell Reef Code B-P Ionically Balanced Powered Calcium & Alkalinity Part B 1000g

Aquatic Cove

Brightwell Alkalin 8.3

Instant Ocean Reef Crystals enriched reef salt mix

66% off

Squeaky's Aquatics

Instant Ocean Reef Crystals Salt Mix

brightwell-rainbocode

KensFish.com

Brightwell Aquatics RainboCode

Brightwell Aquatics Potassion - Concentrated Potassium Solut

15% off

Premium Aquatics

Brightwell Aquatics Potassion - Concentrated Potassium Solution 500ml

Brightwell Aquatics Alkalin8.3 - Liquid pH Buffer & Alkalini 250ml

15% off

Premium Aquatics

Brightwell Aquatics Alkalin8.3 - Liquid pH Buffer & Alkalinity 250ml

brightwell-aquatics-shrimp-code

KensFish.com

Brightwell Aquatics Shrimp Code

(1)

Seasonal pet refresh

Seasonal pet refresh

Shop brushes, deshedding tools, nail grinders

Squeaky's Aquatics

Brightwell Aquatics Garlic Power – Concentrated Garlic Supplement – 60 ml

Squeaky's Aquatics

AvidAqua Insight PRO

Squeaky's Aquatics

Brightwell Aquatics MicroBacter7 – Complete Bioculture – 500 ml

Exclusive offer available

Reef Goods

Potassion - Concentrated Potassium Solution

Squeaky's Aquatics

Hanna Instruments HI770710P / 770710P | pH 7.01 and 10.01 Calibration Buffer Sachets | Aquarium Testing

Squeaky's Aquatics

Brightwell Aquatics MicroBacter Start XLM – 15× Live Nitrifying Bioculture – 500 ml

Brightwell Aquatics Shrimp Code 500ml for sale | Splashy Fish

Splashy Fish

Brightwell Aquatics Shrimp Code

Dog routine essentials

Dog routine essentials

Shop leashes, bowls, and lick mats.

Brightwell Aquatics Potassion - Concentrated Potassium Solut

15% off

Premium Aquatics

Brightwell Aquatics Potassion - Concentrated Potassium Solution - 2 Liter

Seachem Reef Advantage Calcium non-caustic reef calcium supplement bottle

Squeaky's Aquatics

Seachem Reef Advantage Calcium

Aquatic Cove

Refractometer Calibration Standard (60ml)

Brightwell Reef Code B Liquid Additive - 2 Litre

J&L Aquatics Ltd.

Brightwell Aquatics Reef Code B - 2 Litre

(1)

Squeaky's Aquatics

Brightwell Aquatics Reef Snow – Marine Snow Coral Nutrition – 250 ml

FritzZyme Trace elements for nitrifying bacteria

Squeaky's Aquatics

FritzZyme Trace

Squeaky's Aquatics

HYDROS Launch – Smart Aquarium Controller – Starter System

Brightwell Aquatics Liquid Reef - 500 ml / 17 fl. oz.

15% off

Premium Aquatics

Brightwell Aquatics Liquid Reef - 500ml

Squeaky's Aquatics

Flipper Standard Float Magnet Cleaner – Scrub, Flip, Scrape, Float

Aquatic Cove

Brightwell Reef BioFuel

Squeaky's Aquatics

Red Sea Calcium Pro Test Kit

Squeaky's Aquatics

Waterbox Alkalinity

BlueLife Flux Rx box - reef-safe treatment for green hair algae and Bryopsis macroalgae in saltwater aquariums

Squeaky's Aquatics

BlueLife Flux Rx

PolypLab Genesis Bacterial Blend 50mL bottle - concentrated dormant bacteria for saltwater reef tank cycling and biofilm support

Squeaky's Aquatics

PolypLab Genesis Bacterial Blend 50mL | Live Reef Bacteria Concentrate

Brightwell Direct

Reef Code B

(1)

Squeaky's Aquatics

Brightwell Aquatics Refractometer & Hydrometer Calibration Standard – 60 ml

Hydros Aquatics

Reef code A

Road trip dog gear

Road trip dog gear

Car harnesses, travel bowls, and cooling vests.

Brightwell Aquatics Liquid Reef - 250 ml /8.5 fl. oz.

15% off

Premium Aquatics

Brightwell Aquatics Liquid Reef - 250ml

31% off

Squeaky's Aquatics

Salifert Potassium Aquarium Test Kit – Saltwater

Instant Ocean aquarium hydrometer salinity tester

Squeaky's Aquatics

Instant Ocean Aquarium Hydrometer

Brightwell Reef Code A Liquid Additive - 2 Litre

J&L Aquatics Ltd.

Brightwell Aquatics Reef Code A - 2 Litre

Squeaky's Aquatics

Brightwell Aquatics Coralline Accelerator – Coral Growth Booster – 250 ml

New Wave Aquaria

Microbacter StartXLM - Brightwell Aquatics

Squeaky's Aquatics

Red Sea REEF-SPEC Carbon 100g

Squeaky's Aquatics

Red Sea REEF-SPEC Carbon 1000g

Hydros Aquatics

BrightWell Vitamarin-C

PolypLab Pro-Carbon 500 mL jar of activated carbon for fresh and salt water aquariums

Squeaky's Aquatics

PolypLab Pro Carbon

Fritz aquaADHERE aquarium glue

Squeaky's Aquatics

Fritz aquaADHERE Aquarium Glue

Brightwell Aquatics Reef Code A - Balanced Calcium & Alkalinity System - Part A - 2 Liter

15% off

Premium Aquatics

Brightwell Aquatics Reef Code A - Balanced Calcium & Alkalinity System - Part A - 2 Liter

Squeaky's Aquatics

Hydros Rope Leak Sensor Kit

Brightwell Reef Code B Liquid Additive - 500ml

J&L Aquatics Ltd.

Brightwell Aquatics Reef Code B - 500ml

(2)

Aquatic Cove

Brightwell Liquid Reef

Brightwell Aquatics Reef BioFuel - Enhances Nutrient Uptake

15% off

Premium Aquatics

Brightwell Aquatics Reef BioFuel - Enhances Nutrient Uptake

Brightwell Direct

Kalk+2

Red Sea REEFER Peninsula S-950 G3 Deluxe - Black cabinet

Squeaky's Aquatics

Red Sea REEFER Peninsula S-950 G3 Deluxe (200 Gal)

Brightwell Aquatics KoralColor - Encourages Increased Colora

15% off

Premium Aquatics

Brightwell Aquatics KoralColor - Encourages Increased Colora

Tropic Marin Plus-NP 250 mL reef coral nutrient supplement

Squeaky's Aquatics

Tropic Marin Plus-NP

Hydros Aquatics

BrightWell Restor

IceCap ROX 0.8 Premium Activated Carbon in Small, Medium, Large, and XL sizes

Squeaky's Aquatics

IceCap ROX 0.8 Premium Activated Carbon

Keep your cat entertained

Keep your cat entertained

Felt toys, treat puzzles, and wobblers.

Brightwell Alkalin8.3 front of bottle

J&L Aquatics Ltd.

Brightwell Aquatics Alkalin8.3 - 500ml

Squeaky's Aquatics

CoralVue Hydros Salinity Probe Kit

Quantum Phosphate Remover 250 mL bottle, lanthanum PO4 remover for reef tanks

Squeaky's Aquatics

Quantum Phosphate Remover

Brightwell Direct

Reef Code A

(1)

Brightwell Reef Code A calcium supplement bottle for reef aquariums

Squeaky's Aquatics

Brightwell Aquatics Reef Code A

Hydros Aquatics

Brightwell Reef Code B

Summit City Coral

Brightwell Boost pH+

Aquarium Depot

Brightwell Aquatics Refractometer Calibration Standard - 60ml

(1)

Brightwell Aquatics Boost pH+, 500ml

15% off

Premium Aquatics

Brightwell Aquatics Boost pH+ 500ml

Squeaky's Aquatics

Milwaukee MA887 Digital Salinity Refractometer

Brightwell Direct

Liquid Reef

Squeaky's Aquatics

Microbacter StartXLF

(1)

Brightwell Direct

MicroBacter Purple M

(2)

Brightwell Direct

Shrimp Code

17% off

Squeaky's Aquatics

Aquaforest AF Remineralizer – Mineral Balance for RO Water – Freshwater

Fritz Alkalinity (KH) Test Kit - liquid dKH titration test for freshwater and saltwater aquariums

Squeaky's Aquatics

Fritz Alkalinity (KH) Test Kit

Brightwell Aquatics Replenish - Liquid Trace & Minor Mineral

15% off

Premium Aquatics

Brightwell Aquatics Replenish - Liquid Trace & Minor Mineral

Seachem Reef Fusion 1 500 mL bottle, reef calcium and trace element supplement

Squeaky's Aquatics

Seachem Reef Fusion 1