Aquarium and pond equipment at the best prices!
For those passionate about aquariophily
Having trouble finalizing your order? Contact us 24 hours a day by email at information@zoanthus.fr.
Basin Analysis
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Balling Products
Seawater supplements
Basic elements
Fresh Water Supplements
CO2 system
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Water treatment
Bacterial Treatments
Adverse Treatments
Fish Care
Water treatment
Bacterial Treatments
Adverse Treatments
Fish Care
Water treatment
Bacterial Treatments
Fish Care
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Sand
Substrate for reactor
Sea Salts
Pond Substrate
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Seawater Equipment
Basin Equipment
5€ discount for your first order with the code: BIENVENUE05 (from 100€ purchase, offers cannot be combined)
Aquarium Systems One & Only Treatment – 24x10ml is the ideal solution for starting or restarting an aquarium without stress. This concentrate of live nitrifying bacteria instantly creates a biological balance, allowing the aquarium to function from day one. It eliminates ammonia and nitrites, ensuring a safe environment for fish, corals, plants and invertebrates. Chemical-free, odorless, 100% natural and compatible with both freshwater and saltwater aquariums, it is perfect for start-ups, acclimation or recovery after treatment. Thanks to its 24 ready-to-use ampoules , One & Only saves you valuable time while protecting your aquatic population.
Order it before
15:00 Monday
and receive it
on
Tuesday, February 3, 2026
with
Chronopost - Livraison express à domicile
What makes One & Only so effective is its formula based on live nitrifying bacteria , selected for their ability to quickly transform toxic waste (like ammonia) into harmless compounds. This process, called nitrification, creates an immediate biological balance , without having to wait weeks for the natural cycle to take effect. Whether for a nano-aquarium or a large reef tank, a few drops are enough for the entire ecosystem to stabilize effortlessly. It is a trusted solution to avoid ammonia spikes during the first critical weeks.
This treatment is completely natural , without preservatives, harsh chemicals and most importantly, no unpleasant odor. It is perfectly suited to all types of tanks, whether freshwater or saltwater . Its versatility makes it a wise choice for demanding aquarists who care about the well-being of their wildlife. One & Only also promotes healthy growth of corals, plants, invertebrates and fish , laying the foundations for a clean and stable environment. Whether you are setting up a new tank or have just completed a treatment, it helps to effectively recolonize the biological filter .

One & Only comes in 24 convenient 10ml ampoules , ideal for targeted treatments or regular feedings. It's super easy to use: just shake, open the ampoule, and pour onto the filter or directly into the water. Within minutes, the product will work to restore clear, healthy, and stable water . No more waiting for endless cycles: your aquarium can welcome its first inhabitants in optimal conditions. It's also a great option after a water change, adding fish, or following a medication treatment .
Bio S from Aquaforest is a supplement containing bacteria, which create a favorable environment for the proliferation of strains of Nitrospirae and Nitrobacter .
Pro Bio S 10ml from Aquaforest is a supplement highly concentrated in probiotic bacteria. For the natural elimination of nitrates and phosphates.
REEF ACTIF contains marine bio-polymers, which bind excess nutrients and other harmful substances which are then removed by specialized marine microorganisms.
Ultra Bak Bacto Energy is a nutrient solution for bacteria commonly found in a marine aquarium. After addition of Ultra Bak product, the bacteria will grow rapidly and so will convert unwanted nutrients like nitrite, nitrate and phosphate into biomass.
Clarity™ is the ideal clarifier for fresh and salt water. It uses an advanced flocculating polymer agent, which is safe for plants and reefs.
Fresh food made from 100% copepods caught in clean, unpolluted arctic waters. It is an ideal rich food for all the fish, corals, shrimps... in your aquarium.
Ideal for starting an aquarium , Stability quickly and safely establishes biological filtration in freshwater and saltwater aquariums. Contains a synergistic blend of aerobic, anaerobic bacteria . Stability is completely harmless to all aquatic organisms and aquatic plants.
The T Controller Twin 2.0 is the ideal tool for maintaining the temperature in your aquarium. This digital temperature controller is designed to manage heating and cooling units simultaneously , ensuring a stable and optimal environment for your fish and corals. Thanks to its precision of 0.1°C , it allows fine adjustment of the temperature, covering a range of 16 to 40°C . With high switching power and a seawater-resistant temperature probe, this device is as robust as it is efficient. The clear, easy-to-read LCD screen informs you in real time of the thermal conditions of your aquarium.
ReBiotic is a 100% natural bacteria product that contains a unique blend of bacterial strains . The addition of these special strains helps replenish bacterial stability and repair existing bacterial films that have been damaged by sudden system changes or "Old Tank Syndrome".
ReBiotic bacteria also improve overall water quality and live rock health without the risk of altering water chemistry, disturbing deposits, or growing unsightly algae.
ReBiotic is a 100% natural bacteria product that contains a unique blend of bacterial strains . The addition of these special strains helps replenish bacterial stability and repair existing bacterial films that have been damaged by sudden system changes or "Old Tank Syndrome".
ReBiotic bacteria also improve overall water quality and live rock health without the risk of altering water chemistry, disturbing deposits, or growing unsightly algae.
ReBiotic is a 100% natural bacteria product that contains a unique blend of bacterial strains . The addition of these special strains helps replenish bacterial stability and repair existing bacterial films that have been damaged by sudden system changes or "Old Tank Syndrome".
ReBiotic bacteria also improve overall water quality and live rock health without the risk of altering water chemistry, disturbing deposits, or growing unsightly algae.
AF Starter Pack is a set of products intended for starting a marine aquarium . The products have been selected to allow the carefree launch of a marine aquarium. The salt included in the kit makes it possible to make 250 liters of seawater. The rest of the products will be used to install a rapid biological balance in the tank. With the products in the AF Starter Pack, you will significantly reduce the aquarium's maturation time.
Waste-Away Gels continuously release good bacteria into aquarium water. These good bacteria consume nitrates , phosphates and organic waste while keeping the aquarium cleaner and the water clearer. The gels last up to 30 days and will change colors to indicate they need to be replaced.
This small version is recommended for marine aquariums from 10 to 50 litres.
Waste-Away Gels continuously release good bacteria into aquarium water. These good bacteria consume nitrates , phosphates and organic waste while keeping the aquarium cleaner and the water clearer. The gels last up to 30 days and will change colors to indicate they need to be replaced.
This medium version is recommended for marine aquariums from 50 to 150 liters.
Waste-Away Gels continuously release good bacteria into aquarium water. These good bacteria consume nitrates , phosphates and organic waste while keeping the aquarium cleaner and the water clearer. The gels last up to 30 days and will change colors to indicate they need to be replaced.
This small version is recommended for marine aquariums from 10 to 50 litres.
Royal Nature Bacterial Flora contains a unique blend of bacterial strains selected to quickly establish themselves in your marine aquarium and complete the biological balance in the water.