Grech MultiPro Filter 900 – internal filter

This internal filter is built for aquarium keepers who need to fine-tune water flow and outlet direction instead of working with a fixed-output unit. Its modular body includes sponge and bio-ceramic filtration stages, and the pump output can be set manually, so it can be adjusted to the needs of the aquarium. According to the manufacturer, it is also simple enough for beginners to set up and maintain.

Why it matters

• Adjustable pump output: A large dial sets the pump between 15% and 100% of its capacity, which corresponds to a flow range of 135 to 900 l/h.
• Two-stage filtration in each segment: Water passes through the sponge first and then through the bio-ceramic insert. Water leaving a segment bypasses the sponge in the next one, so the biological stage works on the flow that has already been partly cleaned.
• Adjustable outlet: The outlet can be angled above 90 degrees horizontally or at 45 degrees horizontally, which helps direct the flow within the tank.
• Built-in aeration: A tube and air valve on the outlet section allow water to be aerated.

Specifications

• Brand: Grech
• Manufacturer: SunSun
• Product code: CF
• Power consumption: 12 W
• Maximum pump capacity: 900 l/h
• Minimum pump capacity: 135 l/h
• Dimensions: 11 x 7 x 37 cm
• Weight: 1 kg
• Modules: 6

What it works with

The filter is an internal unit for aquarium setups, mounted inside the tank with the included suction cup plate. Its 135 to 900 l/h flow range allows the output to be matched to the aquarium, and the adjustable outlet helps direct the current. The package includes the complete filter, sponges, bio-ceramic media, the suction cup plate, the aeration kit, instructions and the Grech box.