0 - 4 - 0 Buy this product to enhance your flower quality! The Roots Organics HP2 Liquid Bat Guano is perfect for horticultural hobbyists and professionals alike. This unique formula is a specially extracted source of natural phosphorous and is minimally processed to preserve all of the benefits and amazing synergistic qualities found in bat guano. For added convenience, HP² can be added to any fertilizer program in soil or hydroponics. Size: 1 Gallon. Additional Sizes Available.