Inbuilt pre-filter – the first of its kind in the market There is a big sponge pre-filter built into the lid of each ULTRAMAX filter (with a capacity of ca. 0,26 gal). It is designed to capture course mechanical impurities before they can get inside the filter. In this way, the pre-filter protects the device from clogging, which reduces the required frequency of cleaning to a minimum. Instead, it is sufficient to regularly wash the pre-filter sponge in tap water. This only takes a few minutes and does not require disconnecting the filter from the power supply or taking it out of the aquarium stand.Exceptionally quiet operation: the excellent design of the pump rotor and the rotor chamber – grounded in more than thirty years of experience of AQUAEL’S engineering team – and the use of a ceramic rotor shaft result in virtually noiseless operation. For this reason, the filter can be freely used in any room, even in a bedroom.Exceptionally low power consumption – AQUAEL cares about the natural environment and helps its customers save money. That is why the innovative ULTRAMAX filters consume very little energy, which means lower electricity bills for aquarium keepers. The ULTRAMAX 2000 model only consumes 24 W per hour!Safety of operation – the water inlets and outlets in the ULTRAMAX filters are equipped with dual ball-valves that are extremely reliable. The valves prevent even the smallest water leaks and allow the hoses to be easily and quickly disconnected from the filter when it has to undergo cleaning and maintenance.Product advantages: