Description
Sunsun HJ-311B Internal Filter
The Sunsun HJ-311B Internal Filter is a compact and efficient submersible filter designed for small to medium aquariums. It provides mechanical and biological filtration to keep water clean and healthy for your fish. With its low-noise motor, easy installation, and sponge-based filtration, this filter is perfect for beginners and hobbyists looking for a reliable internal filter solution.
🌊 Key Features
✅ Compact Design – Space-saving filter ideal for small aquariums.
✅ Efficient Filtration – Sponge media removes debris and supports beneficial bacteria growth.
✅ Quiet Operation – Low-noise motor ensures a peaceful aquarium environment.
✅ Easy Installation – Suction cups allow quick and secure placement.
✅ Energy Efficient – Consumes very little electricity while running continuously.
✅ Durable Build – Long-lasting and reliable for everyday use.
🐠 Suitable For
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Tank Size: ~75.
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Fish Types: Guppies, tetras, mollies, shrimp, bettas, goldfish, and small community fish.
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Aquarium Types: Freshwater, planted tanks, nano tanks, and shrimp aquariums.
⚙️ Specifications
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Model: Sunsun HJ-311B
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Type: Internal Submersible Filter
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Filtration: Mechanical + Biological (sponge-based)
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Flow Rate: 300L/H
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Power Consumption: 2W
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Voltage: 220–240V, 50Hz
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Placement: Fully submersible, attaches with suction cups
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Color: Black (may vary by batch)
🔧 How to Use
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Rinse sponge before first use.
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Attach the filter with suction cups inside the aquarium.
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Fully submerge the unit before plugging in.
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Adjust the outlet direction to improve circulation.
🧼 Maintenance
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Clean sponge every 2 weeks in aquarium water.
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Avoid washing with tap water to preserve beneficial bacteria.
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Check and clean the impeller occasionally.
📦 What’s in the Box
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1 × Sunsun HJ-311B Internal Filter
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1 × Sponge Filter Cartridge
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1 × User Manual
✅ Why Choose Sunsun HJ-311B?
The Sunsun HJ-311B Internal Filter is a budget-friendly, compact, and effective filter for small aquariums. Its quiet operation, efficient filtration, and easy maintenance make it a great choice for both beginners and experienced aquarists.
👉 Best for aquarists who need a simple and reliable internal filter for everyday use.










