Floramite is the only thing that rid me of mites. And it doesn't harm the plants in any way. I did see a web site that sells floramite by the oz. I'll try to find it for you.
you need to find a local hydro-store they buy the liter and split it up into oz size bottles.
i used to know a website...
quite being paranoid just go to a store.
Digitalhippy,
LOL, where i live there are no hydro stores. the closest one is probly 3 or 4 hrs away. i live in a rural setting. bout 3,000 people. thats why i order online