True German Made imported additives. These are one of the most popular brands used by German hobbyist. First time ever available to the USA market. You can't find higher quality ingredients.

All QFI additives are free from complexing agents (organic compounds) and preservatives. Therefore, QFI additives cannot be skimmed off and will not pollute the aquarium water. Besides, QFI additives contain active catalysts that accelerate the absorption by corals and other invertebrates.