here is what they are used for:
"Toilet tanks are often the biggest source of water losses in your home - they are
notorious for thier hidden, silent water waste. Just a small invisible toilet leak of two
tablespoons a minute turns in to 15 gallons per day - 105 gallons per week - 5,460
gallons per year, and that's not uncommon. Many toilets quietly lose gallons per hour -
dollars per week.
The Leak Detective is a safe, easy way to find out if you have this problem."
"Choice of color should be based on contrast to the background color of the water body. For instance,
FWT Red offers greater contrast to heavy concentrations of algae.
Fluorescent FWT Red and FLT Yellow/Green because of their fluorescent nature have a greater
apparent contrast than non-fluorescent blue.
For fluorometric testing use fluorescent FWT Red 200, it is more easily detected by fluorometric
equipment.
Fluorescent FWT Red and FLT Yellow/Green may also be detected visually with a simple hand-held
laboratory black light (UV) at significantly lower levels - in the range of 10ppb.
Blue is frequently used for decorative effects, evaluation of household systems, and generally where
the blue may be more acceptable to public view.
FLT Yellow/Green disappears in sunlight more rapidly than Fluorescent FWT Red and non-fluorescent
Blue.
All colors are resistant to the absorption of suspended matter."
I like the Last Statement, "Suspended Matter" Aka. Fecies.. lol
Thanks,
Sonic625