CrystalClear, 900 Tablet, Thrive Grower Pak, Aquatic Plant Fertilizer Contains Essential Nutrients Designed To Keep Your Aquatic Plants Vigorous & Beautiful All Season Long, Simply Use 1 Tablet For Every Gallon Of Soil Each Month During The Growing Season, Push 1 Tablet 1 Finger Deep Into The Soil, 3" From The Crown Of The Plant, Press Soil Around The Inserted Tablet For Best Results.