Crystalpro Betta Minerals Liquid mineral supplement for freshwater aquariums. Betta minerals is a balanced mixture of essential minerals for betta fishes. Increases growth and colors. Helps prevent harmful parasites. Adds the minerals in nature’s lakes and rivers to aquarium water. Provides healthy water conditions for aquarium creatures. Instructions: Add 1-2 drops for each 1 once a week. 125ml is enough for 1,875L.