oh ok. I was about to order the 5ml UV Pink dye, and you say "Each dye can fill upwards of 5+ water cooling system depending on amount used" And for 10ml you say "Each dye can fill upwards of 25+ water cooling system depending on amount used." how can the 5ml be only be 5+ systems while 10ml be 25+... and to give you an idea, i will have 2 EK400 resavoirs each holding 500ml of water + a few feet of 1/2" tubing. any idea how many times i can fill this 1000ml+ system i can fill using 5ml dye? have you ever calculated how many drops are in your 5ml and 10ml dyes? just curious if i should order 2X5ml pink dyes or not.