Once you have them you cant really get rid of them unless you shut down for awhile
Avid used to get rid of them but the mites are getting a resistance to it
AzaMax
Florimite
Forbid
Avid
all work well but Avid is super toxic and should only be used on babies
I think it will reflect better than anything but its not going to disperse the light at all
I did read in High Times that mirror dont work for this very reason
I've been doing it for a long time now with no problems
basically the HPS ballast has an igniter in it to fire up the HPS bulb and a MH ballast doesnt
let me repeat that- A LONG TIME