Marineland Dionizing & Ammonia Reducing Resin works to boost chemical filtration while also reducing ammonia and nitrites in freshwater filters. This resin works faster than zeolite in removing ammonia from your aquarium, changing color when its depleted letting you know its time to replace it.

• Reduces ammonia and nitrite in freshwater aquariums.
• Resin adsorbs ammonia faster than zeolite
• Blue resin changes color to amber when depleted
• For freshwater