Vista activates and stimulates the breakdown of floating organic solids in the pond water column. It also speeds up the decomposition of nutrient-rich organic debris. Use Vista at the start of your pond treatment season or throughout the season when your pond needs an extra boost of bacteria. The product combines a highly-selective strain of beneficial bacteria with a proprietary blend of activation factors that work together to restore stagnant ponds and lakes to a natural, maintainable ecological balance and beauty. This is a supplemental product to be used in conjunction (on an as need basis) with the AquaSpherePRO. Each water soluble packet of Vista treats up to 250,000 gallons. Veterinarian approved and safe for all fish, pets, wildlife and plants.