I would start with half the recommended dose, so 0.5mL. If you have a quality doser like the GHL or similar, then split it up into two doses at .25mL. I think you'll find that you'll be up to the 1mL a day in no time. I find that splitting the dose you throughout the day to be the best way to dose both. I'm currently dosing every six hours with an hour difference between the two, EasyBooster starts at 6am and Sps Evo at 7am etc....Anyone using this for a tank less than 250 liters? How are you dosing if it's recommended to start with 1ml per 250l? @Jeff@CoralVue @Luis Easyreefs