These Ocean Free Hydra Filtron White Filter wool set are specially designed for Ocean Free Hydra Filtron external canister filters. These extra thick, micro-fine pads effectively trap micro-particles, finer solids, debris, and suspended particles as water passes through to keep your water clear.
The pads are ideally used when the aquarium water becomes cloudy or after tank maintenance to produce crystal clear aquarium water. They should be changed once every 4 to 8 weeks.
Sold in packs of 3.