Brightwell Lugol’s Solution 1 oz. (30 ml)
Brightwell Aquatics LUGOL’S is an extremely powerful iodine solution designed for advanced reef aquarists. It is used to dose iodine in reef aquariums where iodine is essential for the health of hermatypic invertebrates such as corals and clams.
Iodine plays a critical role in detoxifying excess oxygen produced by zooxanthellae, the symbiotic algae living within coral tissues. Excess oxygen can irritate sensitive coral tissues, causing them to shrink or close under bright lighting. Iodine, in the form of iodide ions, binds with oxygen to form non-toxic iodate, reducing oxygen toxicity and allowing corals to remain open and healthy.
Key Features
| Specification | Value |
|---|---|
| Volume | 1 oz (30 ml) |
| Active Ingredient | Iodine (as iodide) |
| Use | Reef aquarium iodine dosing |
| Target Species | Hermatypic corals, clams, and invertebrates with zooxanthellae |
FAQ
How often should I use Lugol’s solution in my reef tank?
Dosage frequency depends on tank conditions and lighting intensity. It is recommended to follow established protocols based on your specific reef setup. Start with low doses and monitor coral health closely.
Is Lugol’s solution safe for all types of marine life?
Lugol’s solution is specifically formulated for hermatypic invertebrates that host zooxanthellae. It should not be used in tanks with sensitive species not adapted to iodine exposure. Always ensure compatibility with your tank’s inhabitants.
Can I mix Lugol’s solution with other additives?
Please contact customer service for guidance on compatibility with other additives.

Tracey MacLeod –
Used Lugol’s solution in my 120-gallon reef tank after noticing corals closing under strong lighting. After a week of dosing, the corals began to open fully and appear more vibrant. The instructions were clear and the product is easy to measure. Highly recommend for reef keepers dealing with oxygen buildup.
Sarah Gibson –
This product made a noticeable difference in my coral health. I used it sparingly at first and adjusted based on how my clams responded. The solution is stable and the packaging is reliable. A bit expensive, but effective for advanced reef setups.
Piers Lawrence –
After months of struggling with coral tissue irritation, I started using Brightwell Lugol’s solution. My Acropora and soft corals have opened up and are thriving. The instructions are straightforward and the product delivers consistent results.