well if u think about it... its like this..

he used 10x concentration, which would mean litterally 20 drops, or around 1mL.

If thats all the staining that was involved with all that dye... im sold.

I was never a bright person. My case has UV lights on the pumps as a visual tool to see if my impellers are turning.

i am down for any dye as long as it doesnt leave a noticeable stain. All the premixes ive used ended up staining.. which is why i completely avoid premix.