Rather than the anemic color you get using food coloring to color the water in your target jugs...
Rit fabric dye is some nice dark color...
Available in powder form in some colors and liquid in all of their colors... The powder is well under $2 per pack and easily would do 5 gallons a very visible water... The liquid goes a bunch further for under $3 per bottle...
Brent
Rit fabric dye is some nice dark color...
Available in powder form in some colors and liquid in all of their colors... The powder is well under $2 per pack and easily would do 5 gallons a very visible water... The liquid goes a bunch further for under $3 per bottle...
Brent