AQUAEL NitroMax Pro is a chemical filter material consisting of an ion exchange resin stabilized with mineral additives for the removal of nitrite compounds from aquarium water. Due to its excellent absorption properties, it resorbs nitrites, which are deadly for aquarium animals, from the aquarium water. At the same time, AQUAEL NitroMax Pro prevents the formation of algae by depriving them of their nutritional basis. AQUAEL NitroMax Pro is used for a short time when nitrite is detected in the water. This is often the case during initial setup, overstocking or after medication treatment. The filter bag should not remain longer than four weeks in the aquarium filter.AQUAEL NitroMax Pro+ protects fish and invertebrates from nitrite poisoning+ removes nitrite from the aquarium water in a flash+ additionally protects against algae formation+ improves the well-being of the animals+ 3 separate bags with 100 ml content each