FlowOne 300 – internal aquarium filter

The FlowOne 300 is a small internal filter for freshwater and aquascaped tanks holding 5–40 L, including setups with shallow water. It addresses two common needs: removing debris to keep the water clear, and adding surface movement and aeration without a large external unit in the cabinet.

Why it matters

• The filter is rated at 200 l/h and is intended for tanks from 5 to 40 L, so it can be matched to small and mid-sized setups.
• The kit includes a sprinkler (spray bar), an air intake, a sponge and suction cups. The sprinkler moves the surface water, and the air intake adds oxygen to the water flow.
• Dimensions of 3 × 3.5 × 10 cm allow it to sit inside the tank with little visual impact on the layout.
• According to the manufacturer, it can run from a minimum water level of 4 cm, which suits shallow aqua-terrarium or low-water arrangements.

Specifications

• Power consumption: 2 W
• Flow rate: 200 l/h
• Recommended tank volume: 5–40 L
• Minimum water level: 4 cm
• Dimensions: 3 × 3.5 × 10 cm
• Weight: 0.19 kg
• Included: sprinkler, air intake, sponge, suction cups

What it works with

The FlowOne 300 suits small freshwater tanks, nano setups and shallow aqua-terrariums within the 5–40 L range. Its low power draw and small body make it practical in tanks where space for equipment is limited. Check that the tank volume and water depth fall within the stated limits before installation.