Filter foam mat blue in the dimensions: 100 x 100 cm, mat thickness: 10 cm. The mat can be used for self cut or for the self contruction of a Filter (e.g. Hamburger Mattenfilter).https://www.aquaristikshop.com/aquaristic/PPI-Filter-Foam-Mat-blue-100x100x10-cm/276140/
- Jan Fred P. wrote about PPI Filter Foam Mat blue 100x100x10 cm in 2016:
simply the best,you can cut it to the shape you wili use it ,and they last almost forever,personally i have it as a forfilter to my ehheim filters,2260 and 2078, then the filters are a lot cleaner and longer betwen rinsing the filtermass.