Goodbye blanket weed isa unique worldwide patented bio product consisting of bacteria cultured on barley straw enzymes and activated barley straw easy to use no mess no measuring simply drop one water soluble sachet of nishikoi goodbye blanket weed into the pond or filter every week one water soluble sachet treats ponds up to 1000 gallons each pack of nishikoi goodbye blanket weed is an 6 week treatment for a 1000 gallon pond effective against blanketweed green water and organic sl