Better if you just check out this video. This guy recommend the same site like i did in my previous post. Detox pills for weed are relatively cheap and very effective.
Detox pills for drug test are mostly sold online, but you might can find some low quality ones in your local headshop. Its crucial to buy quality pills otherwhise the detox wont work and you will fail your test. The best pill what i always recommend is Toxin Rid.
They have 1-2-3-4-5-7 and 10 days programs. it depends on how much weed or any other drug do you use, plus it also depends on your fat mass. It works for Blood and saliva test as well. Weed, Cocaine,Opiates,ecstasy all can be removed from your system with these detox pills.