Aquatopia Hydro Pure Bio Substrate Rings 500g

High quality rings with an extremely high surface area to media volume for superior, intensive biological filtration. Assists with both mechanical and biological filtration- washable and reusable.

Suitable for freshwater and marine aquariums.

For Biological Media:

Do Not Replace Monthly: Unlike the physical filter cartridges (which trap debris and need monthly changes), ceramic biological media should not be replaced or aggressively washed out with tap water. Doing so will destroy the beneficial bacteria colony and cause your tank to cycle again. 

Rinsing: If it gets clogged with debris over a long period, gently rinse the ceramic rings in a bucket of old tank water (never chlorinated tap water) during a routine water change.