30ppi Hamburg Mattenfilter for 10, 15, 20L and 33L gallon tanks

30ppi Hamburg Mattenfilter for 10, 15, 20L and 33L gallon tanks - $45.25

Best Biological Filtration for fish, shrimp baby and breeding fish, fry.

Mobile Hamburg Matten Biological Sponge Filter Black 8X8X23cm

Mattenfilter - SWISSTROPICALS

10g Hamburg Matten Filter Shrimp tank

Mattenfilter Foam — Volker's Aquarium Supplies

Mattenfilter Shop - SWISSTROPICALS

Mattenfilter Shop - SWISSTROPICALS

Mattenfilter Shop - SWISSTROPICALS

All About Matten Filters Including How To Make One

DIY Matten filter for aquariums

Best Biological Filtration for fish, shrimp baby and breeding fish, fry.

Hamburg Matten Biological Sponge Filter Set 31x30x5cm

All About Matten Filters Including How To Make One