All colors are bright and vivid. They can be detected visually in clear, deionized water in the range of 100 parts per billion (ppb) of active ingredient, depending on local conditions.

Features 
• All colors are bright and vivid. They can be detected visually in clear, deionized water in the range of 100 parts per billion (ppb) of active ingredient, depending on local conditions.
• Choice of color should be based on the contrast to the background of the water body. For instance, red offers greater contrast to heavy concentrations of green algae.
• Red, orange, and yellow-green, because of their fluorescent nature may afford greater apparent contrast than non-fluorescent blue
• Fluorescent dyes also may be detected visually with a simple hand-held laboratory black light (U.V.) at significantly lower levels - in the range of 10 ppb in ideal conditions.
• Blue is frequently used for decorative effects, evaluation of household systems, and generally where blue color may be more acceptable to public view.
• Red, orange and yellow/green are sometimes used jointly in dual tracing studies - both visually and fluorometric analysis.
• Some information on the final chart below (resistance to absorption on suspended matter, sunlight resistance and environmental suitability) is also relevant to visual detection at low dye usage levels.
• Tablets: Dissolve in 5 - 8 Minutes
• Certification: NSF - Std 60