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
Tank Size: ~120L
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
Model: SOBO WP-638H
Type: Hang-on-back filter
Flow Rate: 500 L/H
Tank Capacity: ~120L
Power Consumption: 6.8 W
Filter Media Included: Sponge + Activated Carbon Cartridge
Upgradable Media: Ceramic rings, bio-balls, fine filter wool
🧱 Filter Media Setup (Recommended Order)
Coarse sponge (mechanical filtration)
Activated carbon cartridge (chemical filtration)
Ceramic rings / bio-balls (biological filtration)
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
Hang the filter on the side or back of the aquarium.
Place the inlet tube inside the tank and adjust its height.
Fill the filter chamber with some tank water to help priming.
Plug in and switch ON – water will begin circulating.
Adjust the flow speed according to tank needs.
🧼 Maintenance
Rinse sponge every 2–3 weeks using aquarium water (not tap water).
Replace activated carbon every 4–6 weeks.
Rinse bio-media occasionally but never replace all at once.
Clean the impeller and inlet pipe if water flow reduces.
📦 What’s in the Box
SOBO WP-638H filter body
Sponge & activated carbon cartridge (pre-installed)
Inlet tube with strainer
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

