Bacteria-Nature Pond Kent Microbe Start Start up and Spring & Summer Organic Matter Reducer that treats 5000 gal per 16-oz.  Helps reduce build-up of winter organics.  Safe for all ponds and watergardens. Promotes healthy aquatic environment. 100% Biodegradable. MICROBE START 16-oz NATURE POND: MICROBE START 16-oz $10.25 SKU: NAT29 Click here to save 5% off of your order! MICROBE START 64-oz NATURE POND: MICROBE START 64-oz $34.51 SKU: NAT30 Click here to save 5% off of your order!