Quick Summary
The hygger Hang On Back Filter is a 6 W aquarium filter with a stated flow rate of 380 L/H for 40-75 L tanks. It hangs on the outside of the aquarium wall and uses water inlet and outlet parts to move water through the filter box.
The filter description also includes three outlet effects, with a duckbill nozzle, a shower pipe outlet and a straight outlet. These give the buyer a choice of water movement style and make the outlet direction an important check before choosing an offer.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | hygger, so the product can be matched with the correct range. |
| Product type | Hang on back aquarium filter for external tank mounting. |
| Power | 6 W, which is a useful check for the exact variant. |
| Flow rate | 380 L/H, the stated circulation figure for this model. |
| Tank size | Suitable for 40-75 L aquariums. |
| Dimensions | 14 x 9 x 9.2 cm, useful for space planning at the back of the tank. |
| Installation fit | Suitable for glass thickness up to 18 mm. |
| Outlet options | Duckbill nozzle, shower pipe outlet and straight outlet are listed. |
| Filtration media | Ceramic balls and double sponges are named in the filtration path. |
| Special functions | Surface skimmer and adjustable water flow are included features. |
What to Compare Before Buying
- Tank size: This model is stated for 40-75 L aquariums, so check your tank volume before choosing it.
- Glass thickness: The hanging fit is stated for glass up to 18 mm thick, which matters for secure installation.
- Flow style: Compare the three outlet styles and choose the water movement pattern you want in the aquarium.
- Space at the tank edge: The external hang-on design still needs room behind or beside the tank for the filter body.
- Power and flow rating: The listed 6 W and 380 L/H figures identify this version and help distinguish it from the larger size.
Compatibility, Size and Fit
This filter is intended for glass aquariums within the stated 40-75 L range and for glass thickness up to 18 mm. The 14 x 9 x 9.2 cm size is useful when checking how much room is available outside the tank.
If your aquarium is outside those size limits, or if you need a different flow class, a different version is the safer choice. The product also includes an adjustable fixing buckle and a flexible inlet pipe, so the chosen setup should match the tank depth and edge clearance.
What Else You May Need
The filter needs mains power to operate, and the filter box should be filled with water before use. Confirm that your aquarium setup allows for that first start-up step and that the tank edge has enough space for the hanging design.
How It Works
Water enters through the inlet pipe, passes through the listed filter media, and returns through the outlet. The surface skimmer is included to remove floating oil, while the adjustable water flow gives some control over circulation. The listed outlets change how the water is returned to the tank, so the outlet choice affects the feel of the flow inside the aquarium.
Choosing the Correct Version
This model appears in two sizes, with the 6 W version rated at 380 L/H for 40-75 L tanks and a larger 8 W version listed separately. Check the power, flow rate and tank-size match carefully before choosing.
Before You Decide
Confirm that your aquarium is in the 40-75 L range, that the glass thickness is within 18 mm, and that the 6 W, 380 L/H version is the one you want. Also check whether the outlet style and external hanging layout suit the space around your tank.
Follow the manufacturer’s instructions for filling the filter box with water before use and for cleaning the unit.
