I used [This](Botanicare HGC733205 CNS17 Grow Hydroponic Nutrient Fertilizer, 1-Quart https://www.amazon.com/dp/B00IGFJX0O/ref=cm_sw_r_apan_i_72AXJEDYS8QVSN7SZ1B6?_encoding=UTF8&psc=1) and it has been great