Hydor Sintered Quartz Bio-Rings Filter Media – For Optimal Biological Filtration of Fresh, Marine Water Aquariums – pH Neutral, High Water Flow, Universal – Produces Crystal Clear Water – 400 GM

Hydor Professional External Canister Filter Media, 2 pk, Medium, White Pad, Fits 250/350

Hydor Professional External Canister Filter Media, 2 pk, Medium, Black Foam Pad, Fits 250/350

Hydor Professional External Canister Filter Media, Activated Carbon, Freshwater

Hydor Professional External Canister Filter Media, 2 pk, Large, White Pad, Fits 450/600

Hydor Professional External Canister Filter Media, 2 pk, Large, Black Foam Pad, Fits 450/600

Hydor Professional External Canister Filter Media, Zeolite

Hydor Professional 350 Canister Filter, 60-100 gal, 280 GPH

Hydor Professional External Canister Filter Media, 2 pk, Small, White Pad, Fits 150

Hydor Professional 600 External Canister Filter, 90-150 gal, 345 GPH

Hydor Professional External Canister Filter Media, 2 pk Small, Black Foam Pad, Fits 150