Aquascape 98884 Natural Pond Water Tint for Pond and Water Features, 8-Ounce Tints water a natural tea color; shades pond and creates shimmering effect Non-toxic dye with added humic and tannic acids derived from natural organic compounds found in nature One dosage lasts up to 6 weeks Easy-to-use pump top; 8-ounce bottle treats 5,000 gallons of water; single dose (1 pump) treats 100 gallons