Terra Aquatica TriPart starter kit. This 3-part soft water nutrient helps you meet all your plants' changing needs. Micro provides micro, sub-micro, and complementary macro-nutrients. Grow stimulates structural and vegetative growth with nitrogen, potassium, and secondary minerals. Bloom stimulates root formation and healthy growth with phosphorus and potassium. TriPart works for hydroponics, coco, and soil.