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Seachem Focus 5gm – Advanced Antibacterial Polymer for Internal Fish Infections.
Protect the health of your aquarium fish with Seachem Focus 5gm, a scientifically formulated antibacterial polymer treatment designed for the effective management of internal infections in fish. This advanced product is ideal for both freshwater and marine aquariums, offering a safe and efficient way to deliver medication directly to your fish through food, ensuring maximum absorption and minimal water contamination.
Unlike traditional water-based medications that diffuse into the tank and can affect plants, invertebrates, or water chemistry, Seachem Focus™ binds medication directly to fish food. This method delivers treatment straight to the fish’s digestive system — where internal infections develop — and significantly reduces medication loss to the surrounding water. As a result, Focus™ is especially useful in community tanks or planted aquariums where sensitive species like shrimp, snails, or corals are present.
Seachem Focus™ uses a unique polymer-bound nitrofurantoin (0.1%) as its active ingredient. This polymer acts as a carrier that allows the medication to be safely and evenly distributed in food, making it more palatable for your fish while ensuring a controlled release of the antibacterial compound inside their system. This precise method of medication delivery not only ensures better results but also avoids the common side effects associated with medicating the entire tank.
You should use Seachem Focus™ when your fish exhibit signs of internal bacterial infections, such as:
Loss of appetite or refusal to eat.
Bloating or swelling in the abdomen.
White or abnormal stools.
Weight loss, lethargy, or clamped fins.
It’s also ideal in the following scenarios:
During combined treatments: When treating multiple infections simultaneously, Focus™ allows one medication to be used in food while another is added to the water, preventing chemical overload.
In planted or reef aquariums: Using Focus™ prevents damage to plants, corals, or invertebrates that are often sensitive to standard aquarium medications.
For internal bacterial issues: Effective against common pathogens causing infections of the digestive tract and internal organs.
Targets Internal Infections: Effectively treats bacterial infections that cause bloating, appetite loss, and abnormal stool.
Safe for All Aquarium Types: Suitable for freshwater, saltwater, reef, and planted tanks.
Reduces Medication Waste: Prevents medication loss to water through diffusion.
Protects Sensitive Species: Safe for tanks containing corals, plants, and invertebrates.
Palatable Food Delivery: Mixes easily with food, encouraging fish to consume the medication willingly.
Can Be Combined with Other Medications: Ideal for dual treatment strategies - one in food and one in water.
Scientifically Proven Formula: Contains polymer-bound nitrofurantoin for targeted antibacterial action.
Polymer-bound Nitrofurantoin (0.1%)
This antibacterial compound is bound to a special polymer matrix that ensures the medication adheres to food particles and delivers precise dosage directly to the infected fish.
Mix one measure of Seachem Focus™ (use included scoop) with one tablespoon of fish food.
Add an appropriate medication such as Seachem MetroPlex™ or KanaPlex™ if necessary for enhanced effectiveness.
Add a few drops of tank water to moisten the mix.
Feed the medicated food to fish once or twice daily for up to one week.
Store any unused medicated food in a sealed container in the refrigerator for later use.
Safe for use with freshwater and marine fish.
Compatible with other Seachem medications including MetroPlex™, KanaPlex™, and Garlic Guard™.
Does not harm live plants, corals, or beneficial bacteria colonies.
Bacterial enteritis (internal bacterial infection)
Hexamita (Hole-in-the-head disease)
Dropsy (abdominal swelling and scale protrusion)
Digestive system infections caused by internal parasites or bacteria
Secondary internal infections following parasitic infestation
Always monitor fish behavior during treatment.
Remove uneaten medicated food within a few minutes.
Combine with Seachem Garlic Guard™ to increase appetite in sick fish.
For best results, maintain optimal water parameters and a stress-free environment.
Seachem Laboratories is renowned for its high-quality aquarium treatments, developed with over 30 years of aquatic science expertise. Focus™ provides a safe and reliable solution for treating internal infections while maintaining the health of your aquarium ecosystem. Its polymer-based medication delivery ensures that treatment is effective, targeted, and stress-free - making it a favorite among experienced aquarists and professional breeders worldwide.
When used correctly, Seachem Focus 5gm can mean the difference between losing a fish to an unseen internal infection and restoring it to full health in just days.
