Description
SOBO WP-638H Hanging Filter
The SOBO WP-638H is a reliable and efficient hang-on-back (HOB) filter designed for aquariums up to 120 litres. With strong filtration power, adjustable flow, and quiet performance, it’s a great choice for medium-sized community tanks and planted setups.
🌊 Key Features
✅ 3-stage filtration – Includes sponge (mechanical), activated carbon (chemical), and space for biological media like ceramic rings for crystal-clear water.
✅ Adjustable flow control – Gentle setting for small fish or shrimp, stronger flow for larger community tanks.
✅ Surface skimmer option – Helps remove floating oil, dirt, and protein film.
✅ Quiet operation – Low vibration and minimal noise, suitable for bedrooms or living rooms.
✅ Compact design – Hangs neatly on the tank without taking up swimming space.
✅ Easy maintenance – Quick access to filter chamber for sponge rinsing or media replacement.
🐠 Suitable For
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Tank Size: ~120L
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Fish Types: Tetras, Guppies, Mollies, Platies, Swordtails, Rasboras, Gouramis, Angelfish, Shrimp & Snails.
⚠️ Not recommended as the only filter for large messy fish like Goldfish, Oscars, or Arowana (can be used as an additional filter).
⚙️ Specifications
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Model: SOBO WP-638H
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Type: Hang-on-back filter
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Flow Rate: 500 L/H
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Tank Capacity: ~120L
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Power Consumption: 6.8 W
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Filter Media Included: Sponge + Activated Carbon Cartridge
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Upgradable Media: Ceramic rings, bio-balls, fine filter wool
🧱 Filter Media Setup (Recommended Order)
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Coarse sponge (mechanical filtration)
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Activated carbon cartridge (chemical filtration)
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Ceramic rings / bio-balls (biological filtration)
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Fine filter wool (optional – for polishing water)
👉 For shrimp tanks, use a sponge pre-filter on the intake to prevent baby shrimp from being sucked in.
🔧 How to Install
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Hang the filter on the side or back of the aquarium.
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Place the inlet tube inside the tank and adjust its height.
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Fill the filter chamber with some tank water to help priming.
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Plug in and switch ON – water will begin circulating.
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Adjust the flow speed according to tank needs.
🧼 Maintenance
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Rinse sponge every 2–3 weeks using aquarium water (not tap water).
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Replace activated carbon every 4–6 weeks.
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Rinse bio-media occasionally but never replace all at once.
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Clean the impeller and inlet pipe if water flow reduces.
📦 What’s in the Box
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SOBO WP-638H filter body
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Sponge & activated carbon cartridge (pre-installed)
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Inlet tube with strainer
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Adjustable flow control knob
✅ Why Choose SOBO WP-638H?
The SOBO WP-638H Hanging Filter is a powerful yet budget-friendly choice for aquarists who want simple setup, strong filtration, and quiet operation. Its multi-stage system ensures clean water, stable oxygen levels, and a healthy tank environment.
👉 Ideal for community tanks, planted aquariums, and shrimp setups up to 120L

