Green Gear Disc Aquarium Filter Foam

Key Technical Parameters

The Green Gear Disc Filter Foam is engineered with precision-grade open-cell polyurethane, available in three diameters — 60 mm, 80 mm, and 100 mm — each featuring a centered mounting hole for hassle-free installation in canister filters, sumps, and internal filter housings. Pore density ranges from 30 to 50 PPI depending on size, delivering consistent flow-through while trapping fine particulate debris before it reaches your biological media.

Density and Flow Characteristics

With a foam density of 25–35 kg/m³, this gear-shaped disc strikes the ideal balance between water resistance and surface area. The gear-tooth outer edge creates micro-turbulence that slows water just enough to maximise particle capture without choking your pump. Unlike flat discs, the gear profile increases effective filtration surface by approximately 18 %, meaning less frequent rinsing and longer media life between maintenance cycles.

Mechanical Filtration Performance

In real-world aquarium use, the green variant's medium-pore matrix excels at trapping fish waste, uneaten food, and plant detritus down to 0.3–0.5 mm while allowing beneficial nitrifying bacteria to colonise the internal pore walls. After the initial two-week break-in period, the foam doubles as a semi-biological medium, contributing to ammonia and nitrite reduction alongside your dedicated bio-media.

Size Selection Guide

Choose the Small (60 mm) for nano tanks under 60 litres and compact internal filters; the Medium (80 mm) suits most standard canister filters rated 800–1200 L/h; and the Large (100 mm) is designed for high-flow sumps and external filters handling 1500 L/h and above. All three sizes share the same 15 mm thickness and center-hole diameter, ensuring a secure fit on standard filter spindles.