sponge filter

3.0

A soft sponge in a fish tank that traps dirt and adds air while letting good bacteria grow

noun
/spʌndʒ ˈfɪltər/

Specialized

: filtro de esponja

I use a sponge filter in my fish tank because it's gentle on small fry.

Examples

Many aquarists choose a sponge filter for breeding tanks due to its biological filtration capability.
The sponge filter needs to be rinsed regularly to maintain water quality in the aquarium.
The sponge filter keeps the aquarium clean.
I bought a new sponge filter for my fish tank.
A sponge filter helps keep the fish tank clean by trapping debris and promoting healthy bacteria growth.
Many aquarium enthusiasts choose a sponge filter because it effectively aerates the water while filtering out waste.
To maintain a clear and healthy aquarium environment, you should regularly clean your sponge filter.

Synonyms

filter

vssponge filter

139 2.8

A thing that removes unwanted parts from water, air, light and sound

is specialized for aquarium use trapping debris and supporting beneficial bacteria in water

How Effective

water filter

5 2.2

sponge filter

Specialized

3.0

Surface Forms

sponge filter singular

sponge filters plural

Morphology

sponge + filter

The meaning is directly compositional: 'sponge' (a porous cleaning/absorbing material) + 'filter' (a device removing impurities) yields a filter made of sponge. This noun–noun compounding follows a common, transparent pattern and a B1 learner who knows both constituents can readily infer the intended aquarium device.

Etymology

Sponge filter comes from the two words sponge and filter, because a soft sponge traps dirt and gives a place for good bacteria while the filter cleans the water. So, a sponge filter today means a simple aquarium device that 'cleans' the water and 'adds air', and is gentle for small fish.