how do you add nutirnets?

I am wondering how you add nutrients into aerophonics setup...

do you have to put water in a jug and mix the nutrient and just feed them the water that way... or do you just add the nutrients directly into the basin??

currently I have just put the nutes right into the basin today and I have no idea what I am doing when it comes to the nutes...

please help me and tell me the methods you use to add the nutes, along with how often you add them.

thanks!