Five inches of undyed pond water.
Five inches of dyed pond water.
Secchi disc readings at one foot...dyed water.
Two feet.
Three feet.
Four feet.
Please be aware however that plant control is secondary in this application, and the dosage is approx. 1/2 of what the label specifies. I look at adding pond dye like I do with making chili.....better to add half the seasonings, taste it, and go from there. I can always add more, but it's downright difficult to remove it once it's added to the mix.
I add some dye, wait 24 hours, and evaluate what I have. If I were set on limiting plant growth as the primary reasoning behind using the stuff, then I would need to pay greater attention to the dosage, the particular species of plant I was concerned about, the time of year it was in relation to the growing cycle, and the depth where the plant was most problematic.
