You would be amazed at how many bugs are on your smoke and you don't know it.

Smoking spidermites does not have any adverse effects. Millions of people smoke them everyday and don't know it. Unless you look at every bud with a microscope how do you know ?

Growing your own is the only way to be sure.

On the bubble bags. I don't have them but have seen them and the bags are the screens. You get 5 or 8 bags and each is a smaller screen. There are alot of videos on utube showing how to make bubble hash.