Hi dear Carlos. As far as I ...

Hi dear Carlos. As far as I know the smallest sand media size, which is near the size of aquarium sand, can remove particles up to 20 micron. After that you can use the micro filteration systems for particles up to 5 and 1 micron. Please note that 5 and 1 micron PP cartridges are different in weight. The 1 micron should be more dense and heavier as well. If you needed more clear water then you should go for ultra filteration moduls (UF).

Cheers...