Seachem Reef Iodide

Seachem Reef Iodide is a concentrated, stabilized potassium iodide source that restores and maintains natural seawater iodide levels.

Reef Iodide is a concentrated (8,000 mg/L) stabilized potassium iodide source for reef aquaria that will restore and maintain iodide levels to those found in natural sea water. It is formulated to provide a safe source of iodide that will not convert to toxic free iodine under storage or reef conditions. Iodine is as toxic as chlorine and should never be used in a reef system. However, iodide is as safe as chloride. Sizes: 250 mL

Most iodine supplements on the market are simply potassium iodide or a medicinal disinfectant commonly known as Lugols Solution. Lugols is a highly concentrated iodine/iodide solution that is highly toxic and intended for disinfection. Although such products are sold for use in reef aquaria, we believe the risks vastly outweigh the potential minor benefits. Potassium iodide only products are a safer alternative but not very effective alone owing to the unstable nature of iodide in the aquarium environment. When added to an aquarium environment, iodide becomes unstable converting to elemental iodine (which is biocidal), iodate (which is useless to corals, toxic at elevated levels, and can't be tested for), and iodide which is the only form of iodine available to corals for uptake. These products' inherent instability makes them potentially dangerous to coral health. Unlike competing products, Reef Iodide is complexed to a stabilizing compound in order to keep it in the iodide form when added to the aquarium. All of the product remains usable and fully bio-available.

Please note that each cap thread is approximately 1 mL, full cap is 5 mL. BEGINNER: Add 5 mL (1 capful) for each 200 L (50 gallons*) every other day. ADVANCED: Add 1 mL for each 80 L (20 gallons*) daily to raise iodide by 0.10 mg/L. If necessary, adjust amount so that iodide reads 0.06-0.08 mg/L 6-12 hours after the last amount. Thereafter, use this amount daily and check iodide twice a month. EXPERT: After determining the iodide consumption rate, set up a continuous drip system. Use the following formula to determine how much to add to your top-off water: m=0.5vi (m=mL of product to add to top off water, v=volume of tank in gallons*, i=amount to raise iodide in mg/L). For example, if you want to raise iodide by 0.10 mg/L in a 50 gallon* tank, then you would add 0.5x50x0.10=2.5 mL into the top-off water. HINTS: It is normal for iodide levels to decline after a few days. This results from utilization and chemical depletion. Therefore, frequency of use will vary with different reef tanks. Dosing can be adjusted based on coral response. To check iodide levels use Seachems MultiTest: Iodine/Iodide test kit.

Compatibility

Marine and reef, and safe with invertebrates — it is aimed squarely at soft corals, gorgonians and Sarcophyton.

The iodide is complexed so it stays as iodide in the tank rather than converting to free iodine. It is not Lugol's solution and should not be dosed as though it were.

Beginner dose: 5 mL per 200 L (50 US gallons) every other day. Iodide levels falling back within a few days is normal.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number — or email us, if you would rather — and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 72 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.

Freshness & Storage

Every batch we dispatch carries a minimum of 6 months' remaining shelf life. Store this product in a cool, dry place away from direct sunlight, with the cap or inner foil closed tightly after each use.