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' First Defense Treatment – 24x10 ml is the perfect little boost to boost the health and resilience of your fish, corals, and invertebrates. This unique blend of vitamins, immune boosters, and natural protectants reduces the stress of water changes, treatments, or shipping. It also helps neutralize heavy metals, chlorine , and other unwanted substances while maintaining a healthy pH balance. Whether after a disturbance or when acclimating new residents, this 100% safe product supports the energy, coloration, and natural immunity of aquarium inhabitants. All in just a few easy-to-administer drops.
What makes First Defense so powerful is its balanced blend of essential vitamins and natural immune boosters . These ingredients boost the natural ability of aquatic organisms to defend themselves against external aggressions. The result: your fish are more vibrant, more colorful, and above all, less prone to disease. It is a valuable ally for strengthening the resilience of tank inhabitants , especially after treatment, acclimatization, or a major disturbance. By preventing rather than curing, this treatment makes your aquarium more stable and peaceful in the long term.
One of the major advantages of this treatment is its ability to neutralize harmful compounds present in tap water, such as chlorine, chloramine or heavy metals. At the same time, it works to stabilize the pH , an essential factor in maintaining a healthy environment. This makes First Defense a wise choice during each water change or new introduction into the aquarium. It protects the most sensitive organisms from the first minutes, while helping the entire tank regain optimal balance.

Presented in 24 10 ml ampoules , First Defense is easily integrated into your maintenance routine. Simply pour the dose directly into the tank or onto the filter, as needed. Whether you have a planted freshwater aquarium or a reef tank populated by demanding corals, the product is completely safe for all aquatic species . Thanks to its natural and versatile formula, it quickly becomes essential for keeping an aquarium in top shape, without stress or complications.