Tropical Shade Liquid creates a natural Deep Blue look. Toss and Go are convenient premeasured water sluble packets. Each packet will color approximately 1 acre foot (325,000 gallons of water). The plastic film will dissolve in 5-10 minutes. Environmentally safe, non-toxic and bio-degradable NSF Certified to the ANSI/NSF standard 60. When used in proper dilutions, it is harmless to wildlife. Each box contains four 4oz packets.