Tropic Marin All-For-Reef is a revolutionary approach to dosing, combining calcium, alkalinity, and other trace elements into a single, easy to use solution. It’s no longer necessary to maintain two, three, or four solutions, or a complicated reactor. All-For-Reef is a balanced source of calcium and carbonate hardness, released through natural biological processes, along with a mix of trace elements. No mixing, no gas cylinders, no fuss. Start with a daily dose of 5 ml of All-For-Reef per 100 liters (26 US-gal) of aquarium system volume. Increase the daily dosage – by continuous control of the alkalinity – weekly by 2.5 ml per 100 liters (26 US-gal) of aquarium system volume, until a constant ALK of 7 to 9 °dkH is reached.