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Aquarium Additives, Aquarium Supplements & Aquarium Water Treatments

Additive Measuring Devices Aquarium Additives by Type:
Aquarium Vitamins
The Aqua Medic Aquaspoon with LCD display will ensure an accurate measurement of calcium, buffer and other additives
Aquarium vitamin supplements & food soaks for fish & invertebrates. Includes aquarium vitamin supplements from Boyd Enterprises (Vita-Chem), Brightwell Aquatics (Vitamarin, Koralle, AngeLixir). . .
Aquarium Additives by Type:
Aquarium Additives by Type:
Calcium / Kalkwasser
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. . .
Kalkwasser replenishes the calcium used during the growth of stony corals, coralline algae, clams, etc. It is necessary to add calcium to reef aquariums in order to replenish the calcium utilized in the growth of soft and stony corals, pink coralline algae. . .
Aquarium Additives by Type:
Aquarium Additives by Type:
Planted Tank
Aquarium iodine supplements replenish the Iodine that is rapidly removed by plant and animal growth, protein skimming, activated carbon, and ozone use. Iodine is required for healthy growth and colorful pigmentation in soft and stony corals. . .
Additives specific to the needs of freshwater planted tanks, such as Seachem Flourish & Brightwell Aquatics FlorinMulti, Blackwater and more
Aquarium Additives by Type:
Reef Aquarium Supplements
Aquarium Additives by Type:
Supplements for Freshwater
Aquarium supplements from Brightwell Aquatics, E.S.V., Inland Sea, Kent Marine, Sea-Lab & Two Little Fishies to assist in the growth of corals
Products from Brightwell Aquatics for freshwater aquariums: Clarifi-FW, DiscusCode, Florin Delta GH+ & KH+, FlorinBacter, RainboCode & Remineraliz
Aquarium Additives by Type:
Water Treatments
Additives by Manufacturer:
Brightwell Aquatics
Aquarium water treatments to assist in the removal (and detoxification of) chloramines, chlorine, ammonia, nitrite, nitrate and phosphates. Includes aquarium water treatments from Kordon (NovAqua & AmQuel), AquaBella, Brightwell Aquatics (MicroBacter & PhosPhat E), Kent Marine (Poly-Ox). . .
Brightwell Aquatics products are formulated by a published marine scientist who has been a passionate aquarium hobbyist for over 25 years. The goal in formulation is to always utilize the highest purity ingredients in concentrations most useful to. . .
Additives by Manufacturer:
Additives by Manufacturer:
CaribSea AragaMilk (calcium, carbonate buffer, and essential trace elements) and CaribSea Purple-Up Coralline Algae Accelerator.
E.S.V. products include the popular B-Ionic Calcium Buffer System (w/ calcium) & B-Ionic Magnesium.
Additives by Manufacturer:
Additives by Manufacturer:
Elos Filtra P and Ca Pur Granular Calcium Carbonate.
The Fluval products are conditioners and mineral supplements that are specific to the needs of shrimp tanks.
Additives by Manufacturer:
Inland Seas
Additives by Manufacturer:
Kent Marine
Replenishing trace elements is a major requirement for long term success in maintaining and propagating corals in captive marine systems. Inland Seas has formulated a one step trace element and vitamin supplement called Biotrace to replenish the trace elements. . .
A large assortment of Kent Marine buffers, calcium, invert foods, iodine and supplements for your reef aquarium.
Additives by Manufacturer:
Additives by Manufacturer:
Laguna Pond
Kordon AmQuel effectively removes ammonia, chloramines, toxic pheromones and chlorine in both freshwater and saltwater aquariums. Kordon NovAqua removes heavy metals and chlorine from Tap Water, and dismantles chloramines in tap water.
The Laguna pond additives include Algae Remover, Bio Booster (living microbes), Clear Fast, Water Prep, Plant Grow & more
Additives by Manufacturer:
Marc Weiss
Additives by Manufacturer:
Marc Weiss Company's "Vital" product line is dedicated to creating an environmental equilibrium for the aquarium hobbyist. Marine life thrives best in its own natural environment. The Marc Weiss "Vital" products are designed with specific targeted. . .
Microbe-Life products are natural products for keeping ponds clean. They include Algaway (algaecide), Barley Straw (algaecide), Gel Filter Pad Bacterial Inoculant (bacteria), Nite-Out II (bacteria), PL Natural (bacteria). . .
Additives by Manufacturer:
Additives by Manufacturer:
Red Sea
Prodibio additives are uniquely packaged in small sealed single-dose glass vials. These vials are tinted to protect the active ingredients in our products from light and allow for a long shelf life and storage at room temperatures. The vials contain very little water and are pre-measured for single use.
The Red Sea Complete Reef Care Solution, including the Red Sea Reef Foundation Supplements, is a complete solution for optimal coral health, accelerated coral growth and enhanced coral coloration
Additives by Manufacturer:
Additives by Manufacturer:
Sea-Lab #28 restores and maintains the concentration of calcium, strontium and all trace elements at the same levels found in the sea, automatically. Formula #28 always works, and cannot be overdosed. This is not a slow-dissolve or time-release. . .
We carry a wide variety of Seachem products, including Prime, Flourish, Stability, Buffer, Purigen, ParaGuard, De-Nitrate & Clarity.
Additives by Manufacturer:
Additives by Manufacturer:
Sera Bio Nitrivec immediately creates a biological equilibrium in an aquarium. It breaks down uneaten food, ammonium and nitrite biologically.
Thrive Aquatics started in aquatics with its saltwater products. Their saltwater additives are Thrive Alkalinity, Calcium, Magnesium,  Iodide, Strontium, Potassium, Phosphate Remover & Bio Stimulant
Additives by Manufacturer:
Two Little Fishies
C-Balance two-part calcium, Bactiv8 NPX, BioPronto, CDX Carbon Dioxide Adsorption Media & Kalkwasser

Exactly which aquarium additives to use is a complicated question. However, all reef aquariums will need either calcium or kalkwasser (or both), supplements and buffer.
  • Buffer is used to maintain pH. We recommend the Inland Seas Marine and Reef Buffer.
  • You can use several types of supplements or just use a comprehensive formula such as the Inland Seas Biotrace, which includes Strontium, Iron, Iodine, Molybdenum, Vitamin C and B12, as well as other trace elements, vitamins, and amino acids.
  • It is necessary to add calcium/kalkwasser to reef aquariums in order to replenish the calcium utilized in the growth of soft and stony corals, pink coralline algae, calcareous algae, tridacna clams, and other invertebrates found in captive marine systems.
To raise certain types of corals you may want to add extra Iodine, Strontium, Maganese and Molybendum. Kent Marine offers an extensive line of aquarium additives specifically for Iron, Strontium, etc.

The Brightwell Aquatics line of products is a line of aquarium water treatment additives created by the scientist who developed the original Kent Marine line of aquarium additives.

The Red Sea Reef Foundation, Coral Colors and Reef Energy supplements are all part of the integrated Red Sea Reef Care Program. We have many links to documentation and videos that explain how to use these additives, along with the Red Sea Pro Test Kits to create a healthy and vibrant reef aquarium.

A few of the most popular aquarium additive products:
Other additives are useful aquarium water treatments, such as Kordon AmQuel, which effectively removes ammonia, chloramines, toxic pheromones and chlorine in both freshwater and saltwater aquariums.

Medications for treating ich and other diseases are in the Medications section. Carbon substances and compounds for removing phosphates and nitrates are in the Chemical Filtration section.