Marc Weiss' Rift Lake Vital is ideal for Lake Tanganyika, Malawi, Victoria and other hard water cichlids. Replenishes the necessary biological trace compounds that these fishes absorb and utilize on a daily basis. Contains immuno-stimulants to enhance disease resistance. Beneficial microbes compete with disease organisms: bacterial, viral and fungal. Contains all natural ingredients. Enhances color and stimulates fertility and spawning.