Had to replace the liner in my pool so I am starting fresh.

AquaRite manual says I need 80 ppm of CYU, I figure 3kg should do the trick for now.

Question is how do I get 3kg of CYU into my pool?
Do I just mix it in a bucket of warm water and then pour it into the pool?
Don't really like the idea of adding it to my skimmer since I don't want to clog up the impeller in the pump. Could I just open the sand filter and pour it in that way?