Marineland White Diamond Ammonia Neutralizing Crystals Filter Media removes ammonia from your aquarium for a healthier aquatic environment. These neutralizing crystals are ideal for all freshwater aquariums and ponds. White Diamond removes up to four times more deadly ammonia to keep water clean and fish-safe. It also protects against sudden ammonia "spikes" and helps control the presence of ammonia, especially during the break-in period.

• Removes toxic ammonia for a healthier aquatic environment for fish to thrive in
• Protects against sudden ammonia "spikes" that could cause harm
• Helps control the presence of ammonia, especially during the break-in period
• Powerful white Diamond removes up to four times more deadly ammonia to keep water clean and fish-safe
• These neutralizing crystals are ideal for all freshwater aquariums and ponds