JBL Tropol (Humic Conditioner)Fish and plants need to be as comfortable in the aquarium as they are in nature. Transform your aquarium water into biotope like water to protect the fish with natural substances. For water changes and setting up new aquariums. Tropical water in the home aquarium Tropol adds nature identical substances to the tap water to make it similar to the natural waters of tropical ornamental fish with its many humic substances. Note: The humic tannin effect