Fauna Marin AEFW X, 500ml
SKU: FM-AEFW-17
- Fauna Marin AEFW X 500ml is a reef-safe pest control solution that works against Acropora flatworms (AEFW and NAEFW).
- It blocks flatworm larval development and stops adult reproduction, using less than 2% capsaicin extract.
- 500ml size; also available in 1000ml.
Fauna Marin
Fauna Marin is a German manufacturer offering an extensive, successful product line that includes coral and fish foods, water treatments, lab tests, and equipment.
Fauna Marin AEFW X: Acropora Flatworm Treatment for Reef Tanks
Acropora eating flatworms (AEFW) are one of the most damaging pests an SPS keeper can face. They hide in plain sight, laying eggs at the base of Acropora colonies and slowly stripping tissue until the coral bleaches and dies. Fauna Marin AEFW X is a targeted, reef-safe solution designed to break the flatworm life cycle directly inside your display tank, without removing corals for dipping or stressing the rest of your livestock.
AEFW X uses a capsaicin-based formula (less than 2% capsaicin extract) to block larval metamorphosis, preventing juveniles from reaching reproductive adulthood. Adults that are already present stop reproducing and cease to grow further. With consistent daily dosing over 4 to 6 weeks, most infested tanks are completely cleared. After treatment, Acropora colonies typically exhibit improved mucus secretion and a stronger immune response, which helps reduce the risk of reinfection.
Key Features:
- Targets two species: Prosthiostomum acroporae (AEFW) and the newer NAEFW flatworm strain
- Blocks larval development, preventing flatworms from reaching reproductive maturity
- Stops adult flatworm reproduction and growth during the treatment window
- Reef safe at recommended doses. Other tank inhabitants, including fish, invertebrates, and non-Acropora corals, are not affected
- Active ingredient is capsaicin extract at less than 2% concentration
- UV sterilizers must be switched off during dosing. Activated carbon, ozone, and adsorbers may remain running
- Treatment can be extended beyond 6 weeks if needed with no documented harm to the reef
Ideal For:
- SPS reef keepers with confirmed AEFW or NAEFW infestations who want to treat in-tank without coral removal
- Acropora-heavy systems where repeated dipping would cause unacceptable stress to colonies
- Hobbyists who have recently introduced new Acropora frags and want to use a preventive dosing protocol
- Tanks recovering from a flatworm outbreak where immune support and reduced reinfection risk are a priority
- Advanced reef keepers running mixed SPS and LPS systems where a reef-safe, targeted treatment is required
Pro Tips:
- Start preventive dosing when adding new Acropora frags.
- Even with a quarantine setup, AEFW eggs can survive on coral tissue. Dropping to the prevention dose (2 ml per 100 liters per day) after adding new Acropora gives you a buffer before any infestation can establish.
- Turn off your UV sterilizer before each dose.
- UV will degrade the active compounds before they reach full concentration in the water column. Dose first, wait at least an hour, then restart UV if needed.
- Watch your Acropora closely during weeks 2 and 3.
- This is when dying flatworms and eggs are released from coral tissue. Some hobbyists see brief, minor stress responses in their Acropora during this phase. Maintain stable parameters throughout treatment to support recovery.
- Do not increase the dose to speed up results.
- The product works by disrupting larval development across multiple generations. Exceeding the recommended dose does not accelerate the timeline and may stress livestock unnecessarily.
AEFW X is Effective Against:
- Prosthiostomum Acroporae (Acropora eating flatworm)
- New AEFW flatworm (NAEFW)
What's Included:
- One bottle of Fauna Marin AEFW X (500ml)
Specifications:
- Active Ingredient: Capsaicin extract, less than 2% concentration
- Target Pests: Prosthiostomum acroporae (AEFW), New AEFW flatworm (NAEFW)
- Recommended Treatment Duration: 4 to 6 weeks minimum; may be extended indefinitely
- UV Sterilizer: Must be switched off during dosing
- Activated Carbon/Ozone/Adsorbers: May remain operational during dosing
- Compatibility: For use in marine aquaria only
While most of our equipment carries a one-year manufacturer's warranty, consumable products like fish and coral foods are not covered under traditional warranty terms due to their perishable nature and varied storage conditions. However, we fully stand behind the quality of every product we sell. If you experience any issues with your food purchase shortly after receiving it, such as concerns about freshness, packaging integrity, or product quality, please contact us at [email protected]. We're committed to making it right and will work with you to resolve any problems quickly and fairly.
Setup and Dosing Instructions*
- Calculate your tank's total water volume in liters, accounting for displacement from rock and sand.
- Select your dosing phase:
- Short-term/active support: 4 ml per 100 liters per day for 4-6 weeks
- Long-term maintenance: 2 ml per 100 liters per day, ongoing
- Switch off any UV sterilizer in your system before dosing.
- Measure the correct dose and add it directly to the aquarium once per day.
- Activated carbon, ozone, and adsorber media may remain running during dosing.
- Monitor Acropora colonies throughout use for signs of improvement, particularly mucus production and tissue condition.
- After the short-term phase, step down to the maintenance dose. Long-term use at the maintenance rate is supported.
Safety Notes:
- For use in marine aquariums only.
- Do not inhale or swallow.
- Avoid contact with skin and eyes.
- Keep out of reach of children.
- Rinse the empty bottle before disposal and follow local regulations.
*Always read the label and product instructions on the bottle before use. Dosing guidelines, safety information, and application instructions are subject to change. The information on this page reflects product details available at the time of publication and may not represent the most current formulation or recommendations.