Review on 🐠 OASE Indoor Aquatics Pre-Filter Foam Set of 6 for The Biomaster 30 Ppi, Black: Enhance Water Filtration Efficiencies by Roger Gibbs

Purchased this direct from Oasis USA with my Bio Master 600. I set up the filter as Pondguru suggested, with medium and fine foam in the bottom basket and maximum biodome in the rest. They ran too much slurry through the pre-filter and within a week the medium and fine foam was clogged. If you had used the default blue foam this might not have happened, but I've since added the included 45ppi carbon foam and I haven't lost any flow rate and it filters more efficiently. If you don't drill extra holes like I did, coarse foams might be fine, but for me and my setup, they let too many particles through. My old Fluval foams are less coarse than these.