The black peat granules consist of approx. 65% black and approx. 35% white peat. Aquarium water become trace elements this, supplied humin acids and tanning substances. Black peat granules seem softening. The pH value has to be checked. The granules are water insoluble and is put between 2 situations filterwool in the filter . Black peat granules make optimal conditions of life for tropical ornamental fishes and increase the spawn readiness. Packet contents of 1000 mlDo you have questions about this article ?