Manganese²⁵+
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Manganese²⁵+ is a concentrated manganese supplement for reef aquariums. It is intended for occasional correction when ICP analysis shows manganese depletion. Manganese plays a key role in zooxanthellae photosynthesis, enzyme activation, and Goniopora tissue vitality. Manganese²⁵+ contains manganese alone, without other trace metals, for precise and controlled correction of reef systems.
Each mL increases manganese by 10 µg/L (10 ppb) per 100 L (26 US gal).
Instructions
Test manganese with a reliable ICP test before dosing.
Calculate dose: 1 mL per 100 L = +10 µg/L manganese 1 mL per 50 L = +20 µg/L manganese
Dose safely: Do not increase manganese by more than 10–20 µg/L per day. Add slowly into a high-flow sump or dose automatically in micro-increments. Re-test before repeating.
Example: In a 100-gallon system, 3.8 mL raises manganese by ~+10 µg/L.
Ingredients
- Purified RO/DI water
- USP-grade manganese salts
Storage
- Store tightly sealed in a cool, shaded location (≤25 °C / 77 °F).
- Protect from direct light.
- Shelf life: 24 months.
- Fine precipitates may form at low temperatures; warm gently and shake before use.
Safety Information
- Not for human consumption.
- Avoid contact with eyes, skin and clothing.
- If on skin or in eyes, rinse with water for 15 minutes.
- If swallowed, rinse mouth and seek medical advice.
- Wash hands after use.
- Keep out of reach of children and pets.
- Discard in accordance with local laws.
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Additional shipping charges may apply to orders with more than one brand.
Canadian Owned Business
The business is majority or fully owned by Canadian citizens.

$24.99 CAD