Brightwell Aquatics Iodion Supplement 250ml, 500ml (Other Brands) (Marine Supplement)

$21.99 USD

Brightwell Aquatics Iodion Supplement 250ml, 500ml (Other Brands) (Marine Supplement)

Brand: Brightwell Aquatics
Product: Iodion
Advanced Iodide Supplement for All Marine Fish & Reef Aquaria

Content: 250ml (8.45fl oz)
Content: 500ml (17fl oz)

  • Highly-concentrated, extended activity iodide solution.
  • Provides iodide, which is important to hermatypic corals and other invertebrates harboring zooxanthellae, macroalgae, and also to the health of fishes.
  • Stronger than most competing products.
  • The nature of iodide sources used makes Iodion more effective than standard iodide-solutions.
  • Suitable for use by aquarium hobbyists of all skill and experience levels.
  • Composed of purified water and ultra-high purity materials.
  • Formulated by a marine scientist.

Technical Background

Presence of iodine is vital to hermatypic invertebrates because it is used to detoxify excess oxygen produced by zooxanthellae. This oxygen irritates sensitive tissue. Corals and clams that appear to shrivel or close under intense lighting are likely attempting to shade their zooxanthellae symbionts to reduce the rate of oxygen production. Iodide essentially bonds with oxygen to form non-toxic iodate, relieving the need to shield zooxanthellae and enabling the host organism to open more fully.

The predominant form of iodine in seawater is iodide. The natural seawater concentration of all iodine species combined is approximately 0.06 ppm, classifying it as a minor element. Even in this small concentration, iodine is required for survival of fishes, crustaceans, macroalgae and kelp, and hermatypic invertebrates alike. The importance of iodine in a reef aquarium cannot be overstated. Iodine binds rapidly with latent organic material and is passively removed by aggressive protein skimming and the use of organic-adsorption products such as activated carbon and specialty resins. The combined biological and chemical depletion of iodine necessitate that its concentration be monitored and the aquarium supplemented as needed. The rate at which iodine is extracted from the water is determined by the stocking density of reef-building livestock, type of lighting, and other biological, physical, and chemical conditions. Once the rate of iodine uptake in the aquarium has been determined, the proper dosing rate of this product can be easily calculated.

All Brightwell Aquatics liquid water care supplements are made with purified water and high purity materials. We develop formulae for aquaria based on empirical data, using observation and measurement rather than theory.

Suitable for marine/saltwater aquariums.


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  • Brightwell Aquatics Iodion Supplement 250ml, 500ml (Other Brands) (Marine Supplement)

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