Pondh2o String Algae Bio's 12000 Gallons, Twin Value Pack, Pond Water Treatment PondH2o String Algae or Blanketweed Pond Water Treatment contains beneficial pond bacteria. Simply throw sachet into the pond, the bacteria will help to reduce string algae and blanket weed. Toss into the pond ideally near moving water or into a pond filter chamber. The bacteria helps to reduce excess fish food, fish wastes, pond much, toxic nutrients such as ammonia and nitrite, problem causing nutrients such as nitrate phosphate, and reduce bottom sludge odors. Used as an alternative to chemicals and mechanical treatments, string algae treatment for ponds is not just good for the environment, but prevents drain blockage and lack of oxygen caused by the spread of algae and blanket weed. Made in the USA and effective. Best used when water is above 50 Fahrenheit. Circulate and aerate the water in the pond. Easy to use. Value Pack of Two (2) ? No Mess Application ? Can Not overdose ? Each Sachet Treats up to 1000 gallons - Will Treat up to 12000 gallons ? Natural Bacterial Treatment We sell many aquatic products online, check out our store! Terms and Conditions. We use all approved forms for accepting payments. Sales Tax will be added to all shipments based on regulations. We always try to combine purchases, please contact us directly for a personal service. You will be notified on the day that your goods have been dispatched via e-mail with tracking which is used on all purchases. Please note that if there are any problems, contact us first via e-mail giving full details of any problem along with your user ID. We use USPS and UPS as our chosen carriers shipments to Hawaii, Alaska Puerto Rico may incur surcharges, contact will be made to advise before shipment at which point the order can be cancelled if desired. Orders placed on Saturday/Sunday Public Holidays will be processed next working day. We pride ourselves on excellent feedback, if any part of the buying experience is not to your satisfaction, please contact us to rectify before leaving feedback. By committing to buy you are agreeing to the Terms Conditions stated above.