You are here: Home > ADDITIVES / SUPPLEMENTS > Additives, Supplements & Water Treatments
By Type
> Aquarium Additives by Type:
Buffer
Additives by Type: Aquarium Buffer

Aquarium pH Buffer replenishes the carbonate and bicarbonate required to maintain or increase the alkalinity of captive marine systems. Alkalinity (carbonate hardness) in captive marine systems constantly decreases as biological processes remove carbonate, and produce acids that neutralize carbonate. Proper alkalinity should be maintained around 2.5-2.9 me (7-8 dKH) for marine fish tanks and 3.2-3.6 me (9-10 dKH) for reef tanks.

Sometimes aquariums in closed offices and homes maintain a low pH due to the accumulation of carbon dioxide in the air. This excess CO2 dissolves into the aquarium water and depresses the average pH. The Two Little Fishies CDX Carbon Dioxide Adsorption Media helps maintain and elevate aquarium pH by removing CO2 (carbon dioxide) introduced through a protein skimmer. Simply pour the CDX into a tall columnar reactor such as the Two Little Fishies PhosBan Reactor and connect the CDX-filled reactor to your protein skimmer's air intake hose. You can use the Two Little Fishies CDX Adaptor or a similar barbed, reducing fitting to connect the air intake for the protein skimmer to the outflow pipe of the reactor.
Sort By:
Page of 2
Brightwell Aquatics Alkalin8.3 KH Buffer, 2 liters Brightwell Aquatics Alkalin8.3 KH Buffer, 2 liters

Product Code: RBA01007
Brightwell Aquatics Alkalin8.3 KH Buffer is a highly-effective alkalinity(KH)-increasing (”buffer”) solution. 2 liters.

Our Price: $21.73
In Stock
Brightwell Aquatics Alkalin8.3 KH Buffer, 500 ml Brightwell Aquatics Alkalin8.3 KH Buffer, 500 ml

Product Code: RBA01006
Brightwell Aquatics Alkalin8.3 KH Buffer is a highly-effective alkalinity(KH)-increasing (”buffer”) solution. 500 ml.

Our Price: $7.80
In Stock
Brightwell Aquatics Alkalin8.3-P KH Buffer, 250 grams Brightwell Aquatics Alkalin8.3-P KH Buffer, 250 grams

Product Code: RBA01098
Brightwell Aquatics Alkalin8.3-P KH Buffer is a highly-effective alkalinity-increasing (”buffer”) powdered blend for all marine and reef aquaria. 250 grams.

Our Price: $5.80
CLEARANCE $4.20
You save $1.60!
In Stock
Brightwell Aquatics Alkalin8.3-P KH Buffer, 500 grams Brightwell Aquatics Alkalin8.3-P KH Buffer, 500 grams

Product Code: RBA01099
Brightwell Aquatics Alkalin8.3-P KH Buffer is a highly-effective alkalinity-increasing (”buffer”) powdered blend for all marine and reef aquaria. 500 grams.

Our Price: $9.80
CLEARANCE $7.07
You save $2.73!
(Out of Stock)
Brightwell Aquatics Alkalin8.3-P, 4 kg Brightwell Aquatics Alkalin8.3-P, 4 kg

Product Code: RBA01101
Brightwell Aquatics Alkalin8.3-P is a KH buffer powder for all marine fish and reef aquaria. 4 kg.

Our Price: $51.51
In Stock
Continuum Aquatics Basis Borate Free KH Buffer, 1 kg Continuum Aquatics Basis Borate Free KH Buffer, 1 kg

Product Code: RCO30412
Continuum Aquatics Basis Borate Free KH Buffer is a high quality, multi-component blended true buffering system designed to raise the alkalinity or buffering capacity of marine fish and reef aquariums and automatically regulate the pH. It will hold pH stable over a wide range of conditions providing for safety of the entire system. 1 kg.

List Price: $19.65
Our Price: $15.18
CLEARANCE $10.34
You save $9.31!
In Stock
Continuum Aquatics Basis Borate Free KH Buffer, 250 grams Continuum Aquatics Basis Borate Free KH Buffer, 250 grams

Product Code: RCO30410
Continuum Aquatics Basis Borate Free KH Buffer is a high quality, multi-component blended true buffering system designed to raise the alkalinity or buffering capacity of marine fish and reef aquariums and automatically regulate the pH. It will hold pH stable over a wide range of conditions providing for safety of the entire system. 250 grams.

List Price: $7.11
Our Price: $5.49
CLEARANCE $3.75
You save $3.36!
In Stock
Continuum Aquatics Basis Borate Free KH Buffer, 500 grams Continuum Aquatics Basis Borate Free KH Buffer, 500 grams

Product Code: RCO30411
Continuum Aquatics Basis Borate Free KH Buffer is a high quality, multi-component blended true buffering system designed to raise the alkalinity or buffering capacity of marine fish and reef aquariums and automatically regulate the pH. It will hold pH stable over a wide range of conditions providing for safety of the entire system. 500 grams.

List Price: $11.95
Our Price: $9.24
CLEARANCE $6.31
You save $5.64!
In Stock
Continuum Aquatics Basis KH Buffer, 250 ml Continuum Aquatics Basis KH Buffer, 250 ml

Product Code: RCO30500
Continuum Aquatics Basis KH Buffer is a high quality, multi-component blended true liquid buffering system designed to raise the alkalinity or buffering capacity of marine fish and reef aquariums and automatically regulate the pH. It will hold pH stable over a wide range of conditions providing for safety of the entire system. 250 ml.

List Price: $6.44
Our Price: $4.98
CLEARANCE $3.39
You save $3.05!
In Stock
Continuum Aquatics Basis KH Buffer, 500 ml Continuum Aquatics Basis KH Buffer, 500 ml

Product Code: RCO30501
Continuum Aquatics Basis KH Buffer is a high quality, multi-component blended true liquid buffering system designed to raise the alkalinity or buffering capacity of marine fish and reef aquariums and automatically regulate the pH. It will hold pH stable over a wide range of conditions providing for safety of the entire system. 500 ml.

List Price: $9.63
Our Price: $7.45
CLEARANCE $5.07
You save $4.56!
In Stock
Continuum Aquatics Reef-Sculpture Part B 2 liters Continuum Aquatics Liquid Reef-Sculpture Part B, 1 liter

Product Code: RCO30713
Continuum Aquatics Reef-Sculpture Part B and Reef-Sculpture Part A used together are an ionically balanced calcium and alkalinity control system. This Part B is the alkalinity control half of the system. It should be used with equal amounts of Part A. Unlike many other products which will cause a buildup of chlorides or other ions, Reef-Sculpture will maintain seawater ratios of important ions. When used as directed it will maintain calcium and buffering capacity in the same ratio found in natural seawater. It contains no acetate, gluconates, polygluconates or other unnecessary organics to pollute your aquarium. It is phosphate and nitrate free. 1 liters.

List Price: $14.30
Our Price: $11.05
CLEARANCE $7.52
You save $6.78!
In Stock
Continuum Aquatics Reef-Sculpture Part B 2 liters Continuum Aquatics Liquid Reef-Sculpture Part B, 2 liters

Product Code: RCO30534
Continuum Aquatics Reef-Sculpture Part B and Reef-Sculpture Part A used together are an ionically balanced calcium and alkalinity control system. This Part B is the alkalinity control half of the system. It should be used with equal amounts of Part A. Unlike many other products which will cause a buildup of chlorides or other ions, Reef-Sculpture will maintain seawater ratios of important ions. When used as directed it will maintain calcium and buffering capacity in the same ratio found in natural seawater. It contains no acetate, gluconates, polygluconates or other unnecessary organics to pollute your aquarium. It is phosphate and nitrate free. 2 liters.

List Price: $16.64
Our Price: $12.86
CLEARANCE $8.76
You save $7.88!
In Stock
Continuum Aquatics Reef-Sculpture Part B 250 ml Continuum Aquatics Liquid Reef-Sculpture Part B, 250 ml

Product Code: RCO30532
Continuum Aquatics Reef-Sculpture Part B and Reef-Sculpture Part A used together are an ionically balanced calcium and alkalinity control system. This Part B is the alkalinity control half of the system. It should be used with equal amounts of Part A. Unlike many other products which will cause a buildup of chlorides or other ions, Reef-Sculpture will maintain seawater ratios of important ions. When used as directed it will maintain calcium and buffering capacity in the same ratio found in natural seawater. It contains no acetate, gluconates, polygluconates or other unnecessary organics to pollute your aquarium. It is phosphate and nitrate free. 250 ml.

List Price: $6.44
Our Price: $4.98
CLEARANCE $3.39
You save $3.05!
In Stock
Continuum Aquatics Reef-Sculpture Part B 500 ml Continuum Aquatics Liquid Reef-Sculpture Part B, 500 ml

Product Code: RCO30533
Continuum Aquatics Reef-Sculpture Part B and Reef-Sculpture Part A used together are an ionically balanced calcium and alkalinity control system. This Part B is the alkalinity control half of the system. It should be used with equal amounts of Part A. Unlike many other products which will cause a buildup of chlorides or other ions, Reef-Sculpture will maintain seawater ratios of important ions. When used as directed it will maintain calcium and buffering capacity in the same ratio found in natural seawater. It contains no acetate, gluconates, polygluconates or other unnecessary organics to pollute your aquarium. It is phosphate and nitrate free. 500 ml.

List Price: $9.22
Our Price: $7.12
CLEARANCE $4.85
You save $4.37!
In Stock
Continuum Aquatics Reef-Basis KH Buffer 1 kg Continuum Aquatics Reef-Basis KH Buffer, 1 kg

Product Code: RCO30407
Continuum Aquatics Reef-Basis KH Buffer is a high quality, multi-component blended true buffering system designed to raise the alkalinity or buffering capacity of marine fish and reef aquariums and automatically regulate the pH. It will hold pH stable over a wide range of conditions providing for safety of the entire system. 1 kg.

List Price: $19.65
Our Price: $15.18
CLEARANCE $10.34
You save $9.31!
In Stock
Continuum Aquatics Reef-Basis KH Buffer 500 grams Continuum Aquatics Reef-Basis KH Buffer, 500 grams

Product Code: RCO30406
Continuum Aquatics Reef-Basis KH Buffer is a high quality, multi-component blended true buffering system designed to raise the alkalinity or buffering capacity of marine fish and reef aquariums and automatically regulate the pH. It will hold pH stable over a wide range of conditions providing for safety of the entire system. 500 grams.

List Price: $11.95
Our Price: $9.24
CLEARANCE $6.29
You save $5.66!
In Stock
E.S.V. 32 oz B-Ionic Calcium Buffer System E.S.V. B-Ionic Calcium Buffer System 32 oz

Product Code: RESV00150
The E.S.V. B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels with no mixing of powders, disruption of ionic balance, or addition of organic chemicals. Each of the bottles is 16 oz.

Our Price: $17.99
Sale Price: $15.99
You save $2.00!
In Stock
E.S.V. 64 oz B-Ionic Calcium Buffer System E.S.V. B-Ionic Calcium Buffer System 64 oz

Product Code: RESV00151
The E.S.V. B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels with no mixing of powders, disruption of ionic balance, or addition of organic chemicals. Each of the bottles is 32 oz.

Our Price: $25.79
Sale Price: $22.99
You save $2.80!
In Stock
E.S.V. 2 gallon B-Ionic Calcium Buffer System Concentrate Refills E.S.V. B-Ionic Calcium Buffer System Concentrate Refills 2 gallon

Product Code: RESV00155
The E.S.V. B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels with no mixing of powders, disruption of ionic balance, or addition of organic chemicals. Each jug is 1 gallon.

Our Price: $44.99
(Out of Stock)
E.S.V. B-Ionic Calcium Buffer System Concentrate Refills 2 gallon w/ Kamoer Micropump Doser Package E.S.V. B-Ionic Calcium Buffer System Concentrate Refills 2 gallon w/ Kamoer Micropump Doser Package

Product Code: RESV00155-Pump
This package includes E.S.V. B-Ionic Calcium Buffer System Concentrate Refills (2 gallon) w/ the Kamoer Micropump Doser Package. The Micropump Doser package has two Kamoer Micropump Dosers, Purple and Clear Colored Silicone Tubing, Tubing Adapters, and Tubing Holders. With the Tubing, Adapter and Holders you'll be able to easily identity the dosing lines and keep those lines separate and neatly organized.

Our Price (price includes free shipping!) $177.99
(Out of Stock)
E.S.V. 8 gallon B-Ionic Calcium Buffer System Concentrate Refills E.S.V. B-Ionic Calcium Buffer System Concentrate Refills 8 gallon

Product Code: RESV00158
The E.S.V. B-Ionic Calcium Buffer is the original, unique, easy to use, two-component liquid supplement system. When using equal volumes of each component, the aquarist can easily maintain calcium and alkalinity levels with no mixing of powders, disruption of ionic balance, or addition of organic chemicals. Each bucket is 4 gallons.

Our Price: $137.99
Sale Price (price includes free shipping!) $119.99
You save $18.00!
(Out of Stock)
Kent Marine Nano Reef Part A-B Kent Marine Nano Reef Part A-B 8 oz each (16 oz total)

Product Code: RKM00857
The Kent Marine Nano Reef Part A-B is a combination calcium and alkalinity supplement formulated for nano reefs and smaller reef systems. 8 oz each (16 oz total).

List Price: $11.99
Our Price: $8.81
You save $3.18!
In Stock
Kent Marine Pro Buffer dKH 8 oz Kent Marine Pro Buffer dKH 8 oz

Product Code: RKM00655
Enhanced Kent Marine Pro Buffer dKH with coralline accelerator raises alkalinity or buffering capacity and works automatically to control pH in any marine aquarium. In addition, when used with any of our calcium additives, it encourages strong coralline algae growth. Each 16 oz. of Pro Buffer dKH will treat 1,900 gallons or 7,200 liters.

Our Price: $4.63
In Stock
Kent Marine Superbuffer, 1000 grams Kent Marine Superbuffer, 1000 grams

Product Code: RKM00006
Kent Superbuffer-dKH is a specially formulated pH buffer and alkalinity or carbonate hardness (KH) builder, designed to adjust the pH of saltwater aquariums to the range of 8.0 to 8.3 and build the KH. 1000 grams.

Our Price: $15.26
In Stock
Kent Marine Superbuffer, 250 grams Kent Marine Superbuffer, 250 grams

Product Code: RKM00004
Kent Marine Superbuffer dKH is a specially formulated pH buffer and alkalinity or carbonate hardness (KH) builder, designed to adjust the pH of saltwater aquariums to the range of 8.0 to 8.3 and build the KH. 250 grams.

Our Price: $5.35
In Stock
Kent Marine Superbuffer, 500 grams Kent Marine Superbuffer, 500 grams

Product Code: RKM00005
Kent Marine Superbuffer dKH is a specially formulated pH buffer and alkalinity or carbonate hardness (KH) builder, designed to adjust the pH of saltwater aquariums to the range of 8.0 to 8.3 and build the KH. 500 grams.

Our Price: $8.97
In Stock
Kent Marine Tech CB 128 oz. Part A Kent Marine Tech CB, 128 oz. Part A

Product Code: RKM00422
Each of Tech-CB Part A and Part B is half of a ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free. 128 oz.

Our Price: $28.95
In Stock
Kent Marine Tech CB, 128 oz. Part A w/ 50 ml Measuring Cup Kent Marine Tech CB, 128 oz. Part A w/ 50 ml Measuring Cup

Product Code: RKM00422C
Each of Tech-CB Part A and Part B is half of a ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free. 128 oz. Includes 50 ml measuring cup.

Our Price: $28.96
In Stock
Kent Marine Tech CB, 128 oz. Part B Kent Marine Tech CB, 128 oz. Part B

Product Code: RKM00426
Each of Tech-CB Part A and Part B is half of an ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free. 128 oz.

Our Price: $28.95
In Stock
Kent Marine Tech CB, 128 oz. Part B Kent Marine Tech CB, 128 oz. Part B w/ 50 ml Measuring Cup

Product Code: RKM00426C
Each of Tech-CB Part A and Part B is half of an ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free. 128 oz. Includes 50 ml measuring cup.

Our Price: $28.95
In Stock
Kent Marine Tech CB, 16 oz. Part A Kent Marine Tech CB, 16 oz. Part A

Product Code: RKM00420
Each of Tech-CB Part A and Part B is half of a ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free.

Our Price: $6.93
(Out of Stock)
Kent Marine Tech CB, 16 oz. Part B Kent Marine Tech CB, 16 oz. Part B

Product Code: RKM00424
Each of Kent Marine Tech CB Part A and Part B is half of a ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free.

Our Price: $6.93
In Stock
Kent Marine Tech CB, 64 oz. Part A Kent Marine Tech CB, 64 oz. Part A

Product Code: RKM00421
Each of Tech-CB Part A and Part B is half of a ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free. 64 oz.

List Price: $13.19
Our Price: $14.95
In Stock
Kent Marine Tech CB, 64 oz. Part B Kent Marine Tech CB, 64 oz. Part B

Product Code: RKM00425
Each of Tech-CB Part A and Part B is half of an ionically balanced, complete calcium and alkalinity control system for all marine aquariums. When used simultaneously in equal amounts the system will raise both the calcium and buffer level in the aquarium, and is phosphate, nitrate and gluconate free.

List Price: $13.19
Our Price: $14.95
In Stock
Reef Foundation B Alkalinity Buffer Supplement Red Sea Reef Foundation B, Alkalinity Buffer Supplement, 16.9 fl. oz

Product Code: RRS22023
Reef Foundation B is a carbonate and buffer complex for the balanced formation of coral skeletons. It contains a complex of carbonate and other buffers present in seawater that maintain proper alkalinity and pH, and is part of Red Sea's complete Reef Care program. For best results dose according to a measured drop in alkalinity and in conjunction with Reef Foundation A and Reef Foundation C.

Our Price: $14.99
In Stock
Reef Foundation B Alkalinity Buffer Supplement Red Sea Reef Foundation B, Alkalinity Buffer Supplement, 2.2 lb

Product Code: RRS22027
Reef Foundation B is a carbonate and buffer complex for the balanced formation of coral skeletons. It contains a complex of carbonate and other buffers present in seawater that maintain proper alkalinity and pH, and is part of Red Sea's complete Reef Care program. For best results dose according to a measured drop in alkalinity and in conjunction with Reef Foundation A and Reef Foundation C.

Our Price: $22.99
In Stock