Highly Concentrated Professional Formula Industrial Quality Great for Arts and Crafts, Inks, Leak testing, Parties, Events, Bio Hazard Training. Paint Making. Eco Friendly, Biodegradable, Non-Toxic, EPA Approved NSF Certified Visible Blue in Light and Fluorescent Blue Glow with a Blacklight GLO-Effex UV water dye for Dramatic water lighting effects for all occasions or projects.

Highly concentrated with a mix ratio of over 50 to 1 so so a little goes a long way.

Available in 5 colors:

Clear/Blue (invisible in water without UV light)
Visible Blue
Alien Green
Fire Red
Purple

These are professional grade dyes used in illumination of water for commercial uses and are very bright with even a small amount.

The above display photo shows the illumination under UV light of each color.

1oz bottle