- Perfect for use in freshwater, saltwater wet/dry filter systems and pond filters
- Promotes gas exchanges that removes harmful gages and wastes
- Provides large surface area that promotes the growth of beneficial bacteria in bio-logical filtration
- 225 pieces per pack, 1 gallon
- Size: 1" Diameter
- Treats: 40 gallons for saltwater / 80 gallons for freshwater
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