-       It is worth placing a sponge cartridge under the filter media basket.

-       This will enhance the purifying effect of the water, and also make full use of the volume of the filter media basket.

-       On it you can then layer any loose media from Aquael's offer – decide for yourself what will work best for your tank.

-       It is also possible to combine loose media with ready-made cartridges dedicated to FZN PRO.