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RTN/STN M 1000 ml by Fauna Marin is a care formula designed to support the coral microbiome and promote the natural balance of the reef aquarium. This modernized version succeeds the RTN/STN X range with an improved formulation, suitable for direct use in the marine aquarium.
The microbiome refers to all the microorganisms naturally associated with coral tissues. This microscopic ecosystem contributes to its biological balance, vitality, and ability to cope with changes in its environment.
RTN/STN M helps create a favorable environment for corals when they show fragility, reduced vitality, or tissue recession. Its 1000 ml format is particularly suitable for large-volume aquariums or systems requiring daily use over several days.
The main benefits of RTN/STN M 1000 ml: support for the coral microbiome, contribution to vitality, direct use in the aquarium, formula suitable for marine aquariums, and economical packaging for large-volume systems.
RTN/STN M is presented by Fauna Marin as the modernized and improved successor to the RTN/STN X series. The new formula focuses on microbiome support and maintaining a biological balance favorable to corals.
When a coral is weakened, the balance between its tissues and the microorganisms around it can be disrupted. Opportunistic microorganisms may then take advantage of this reduced resistance to develop.
RTN/STN M supports corals during these sensitive periods by promoting their well-being and vitality. It also contributes to the overall biological stability of the aquarium when used according to the manufacturer’s recommendations.
The term RTN, for “Rapid Tissue Necrosis,” refers to a rapid loss of coral tissue. The phenomenon can progress quickly and expose the calcium skeleton previously covered by living tissue.
The term STN, for “Slow Tissue Necrosis,” refers to a slower, more progressive tissue recession. Its development can extend over several days and begin in a limited area of the colony.
These manifestations may be linked to various biological or environmental factors. RTN/STN M supports the microbiome and vitality of corals, but its use should always be accompanied by careful observation of the aquarium to identify the source of the problem.
Important: RTN/STN M supports corals during a period of fragility. It does not replace the search for a possible cause such as injury, aggression between corals, a parasite, waste buildup, or a sudden change in the system.
RTN/STN M can be used in marine aquariums housing different groups of corals. It is suitable in particular for aquariums containing SPS hard corals, LPS hard corals, soft corals, or non-symbiotic corals.
It can be used when one or more corals show a loss of vitality, unusual retraction, or tissue recession. Since the product is added directly to the aquarium, it is especially suitable for situations requiring a global action in the system.
The 1000 ml format is suitable for large-volume aquariums, systems with multiple connected aquariums, and users who want enough quantity to cover the recommended usage period.
Fauna Marin recommends using 15 ml of RTN/STN M per 100 L of water each day. The dose should be added directly to an area with strong water movement to ensure rapid distribution throughout the system.
The recommended usage period is 7 to 10 days. Use may be extended when necessary.
| Aquarium volume | Daily dose | Amount for 7 days | Amount for 10 days |
|---|---|---|---|
| 100 L | 15 ml | 105 ml | 150 ml |
| 200 L | 30 ml | 210 ml | 300 ml |
| 300 L | 45 ml | 315 ml | 450 ml |
| 400 L | 60 ml | 420 ml | 600 ml |
| 500 L | 75 ml | 525 ml | 750 ml |
| 600 L | 90 ml | 630 ml | 900 ml |
| 900 L | 135 ml | 945 ml | 1350 ml |
A 1000 ml bottle allows a full 10-day treatment for an aquarium of up to approximately 660 L. It also covers a 7-day period for an aquarium of up to approximately 950 L.
Determine the actual water volume of the system, taking into account the space occupied by the aquascape, sand, and equipment. Then measure the daily dose corresponding to that volume.
Pour RTN/STN M directly into a strongly circulated area of the aquarium. The current helps distribute the formula quickly throughout the system and avoids a localized concentration of the product.
Apply the dose daily for a period of 7 to 10 days. When necessary, the usage period may be extended. Observe the tissues, polyp extension, and overall condition of the corals daily.
Activated carbon must be removed for the entire duration of RTN/STN M use. The carbon could retain certain components of the formula and reduce the amount available in the aquarium.
The protein skimmer, adsorbents, and UV sterilizer may remain in operation. Circulation pumps must also continue running to ensure even distribution of the product.
| Equipment or filtration media | Use with RTN/STN M |
|---|---|
| Activated carbon | To be removed for the entire usage period |
| Protein skimmer | May remain in operation |
| Adsorbents | May remain in operation |
| UV sterilizer | May remain in operation |
| Circulation pumps | Must remain in operation to disperse the formula |
Fauna Marin indicates that Bacto Therapy can be used daily in addition to RTN/STN M. This combination provides additional support for the microbiome and the biological balance of the aquarium.
The recommended complementary dosage for Bacto Therapy is 3 ml per 100 L of water each day during the RTN/STN M usage period.
| Product | Daily dosage for 100 L | Use |
|---|---|---|
| RTN/STN M | 15 ml | For 7 to 10 days, with possible extension |
| Bacto Therapy as a supplement | 3 ml | Every day during RTN/STN M use |
RTN/STN M is formulated from water, natural plant extracts, trace elements, and preservatives.
| Component | General description |
|---|---|
| Water | Liquid base allowing dilution and distribution of the formula. |
| Natural plant extracts | Components integrated into the care formula intended for the coral microbiome. |
| Trace elements | Elements present in small quantities in the formulation. |
| Preservatives | Help maintain the stability of the formula in its packaging. |
| Feature | RTN/STN M Fauna Marin |
|---|---|
| Product type | Care formula intended for the coral microbiome |
| Use | Marine and reef aquarium |
| Volume | 1000 ml |
| Daily dosage | 15 ml per 100 L |
| Recommended duration | 7 to 10 days, with possible extension |
| Addition | Directly into a strongly circulated area |
| Activated carbon | To be removed during use |
| Brand | Fauna Marin |
During RTN/STN M use, inspect weakened corals daily. In particular, observe the boundary between living tissue and the parts of the skeleton that have become visible.
A photo taken each day under similar lighting can help determine whether tissue loss is continuing, slowing, or has stabilized. This regular observation also makes it possible to quickly detect changes in other corals in the aquarium.
Remove organic debris and visible detached tissue fragments from the system. Also check that no neighboring coral is causing burning through contact or through stinging tentacles.
Water movement that is too strong and directed straight at an already weakened area may worsen irritation. Overall circulation should remain sufficient, but the flow must not mechanically damage the tissues.
RTN/STN M is intended exclusively for use in marine aquariums. It must not be inhaled or swallowed. Avoid contact with skin and eyes.
Keep the product out of reach of children. Follow the recommended dosage and consult the information on the packaging before first use.
After the bottle has been fully used, rinse the container and dispose of it in accordance with local waste and recycling regulations.
Warning: do not intentionally exceed the recommended dosage in an attempt to achieve a faster effect. Respect the amount calculated according to the actual water volume of the system.
RTN/STN M 1000 ml Fauna Marin offers a quantity suitable for large reef aquariums and daily use over several days. Its formula supports the microbiome, vitality, and biological balance of corals.
Its dosage of 15 ml per 100 L and direct addition into a strongly circulated area make it easy to use. The protein skimmer, adsorbents, and UV sterilizer can continue to operate during the usage period.
With its large 1000 ml format, RTN/STN M makes it possible to complete a full treatment on large systems while keeping a reserve suitable for possible extension.
RTN/STN M 1000 ml is therefore a complete care solution for supporting weakened corals and sustainably maintaining the balance of their microbiome in the marine aquarium.