Black Cylindrical Stack Aquarium Filter Foam
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Black cylindrical stacked filter foam rings with center hole, designed for canister and external filters, multi-layer construction provides superior debris trapping and bio-filtration.
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产品详情
Key Technical Parameters
Our Black Cylindrical Stack Filter Foam is engineered with precision-spec open-cell polyurethane, delivering consistent flow-through performance across every layer. Each unit consists of multiple stacked foam rings with a precision-molded center hole, ensuring uniform water distribution throughout the entire filter column.
PPI Rating: 30–45 PPI (pores per inch) gradient structure — outer layers capture coarse particulate while inner layers trap fine debris. Layer Count: 4–6 stacked rings per unit depending on size. Available Dimensions: Small (40×60 mm), Medium (50×80 mm), Large (60×100 mm).
Debris Trapping Performance
The black foam's gradient pore structure creates a mechanical filtration cascade. Water entering from the outer surface encounters progressively finer pores as it travels inward, capturing fish waste, uneaten food, plant debris, and suspended particulate at each stage. This multi-stage trapping prevents rapid clogging and extends maintenance intervals significantly compared to single-density foam blocks.
The cylindrical form factor with center hole allows water to flow radially inward through the full surface area of each ring, maximizing contact time between water and foam matrix. This design outperforms flat pad filters by utilizing 360° of the foam's surface rather than just two faces.
Bio-Filtration Capacity
Beyond mechanical filtration, the open-cell matrix provides an extensive surface area for nitrifying bacteria colonization. The black polyurethane formulation is pH-neutral and chemically inert, creating an ideal substrate for beneficial bacteria that convert toxic ammonia and nitrite into less harmful nitrate. Over 2–4 weeks of initial use, the foam develops a mature biofilm that contributes meaningfully to your aquarium's nitrogen cycle.
Compatibility and Installation
Designed as a direct drop-in replacement for most canister filters and external filter cylinders. Simply stack the foam rings inside your filter housing around the central spindle or intake tube. The center hole accommodates standard 12–16 mm filter spindles. Suitable for freshwater, saltwater, and planted tank setups. Rinse with dechlorinated water during maintenance to preserve beneficial bacteria — never use tap water or soap.