Fauna Marin Elementals Trace Se (Selenium) – 250ml
Designed for reef aquariums and compatible with Fauna Marin ICP water analyses.
Supplies essential trace element Selenium to support coral and marine life health.
Helps prevent deficiencies that can affect growth, coloration, and overall vitality.
Made from pure, high-quality raw materials with organic or inorganic compounds.
250ml bottle ideal for precise dosing and long-term aquarium maintenance.
Dosing Recommendation
- 1ml per 100 l (26 US gal) Elementals Trace Se will increase selenium content by approx. 0.5 µg/l (0.26 US gal).
- The dosage is demand-based.
- We recommend a maximum daily increase of 1 µg/l selenium (2 ml Elementals Trace Se per 100 l (26 US gal) daily).
| Parameter | Value |
|---|---|
| Volume | 250ml |
| Active Ingredient | Selenium |
| Application | Reef aquariums |
| Compatibility | Fauna Marin ICP water analyses |
FAQ
What is the recommended dosage for Elementals Trace Se?
1ml per 100 liters (26 US gal) increases selenium content by approximately 0.5 µg/l. A maximum daily increase of 1 µg/l (2 ml per 100 l) is recommended.
Is this product safe for use with other Fauna Marin products?
Yes, it is compatible with Fauna Marin ICP water analyses and designed for use in reef aquariums with other Fauna Marin products.
How long does the 250ml bottle last with standard dosing?
With a daily dose of 1ml per 100 liters, the 250ml bottle will last approximately 250 days for a 100-liter tank.

Ruth Terry –
Used this in my 200-liter reef tank for three months. My corals have shown better coloration and growth. The dosing is easy and the bottle is clearly labeled. Works well with my existing water testing routine.
Sonia Underwood –
Selenium levels in my tank improved noticeably after adding this supplement. I followed the dosing guide exactly and saw better coral health. Would recommend for reef keepers who monitor trace elements.
Wendy Watson –
The product is reliable and easy to use. I mixed it with my weekly water changes and noticed a positive effect on my anemones. The 250ml size is perfect for long-term use without frequent refills.