Nature's Image Barley Straw Pond Treatment
$ 12.95 each

For the prevention of string algae.

Although manufacturer claims each bale treats up to 1000 gallons we recommend 1 bale per 700 gallons.  The barley emits an enzyme that helps prevent the growth of string algae.  2 to a Pack. Easy to place tubular-shaped bales.
2 pack.  Each bale measures approximately 9" L x 6" D.