Hi Mya,
In my opinion 30 day Water Fast is too extensive to do on your own as you may suffer many complications. I have been fasting regularely for 3 years and the longest one I did
was 14 days, I just broke it last weekend. If you do want to do Water Fast that long, it's best to do under doctor's supervission or in the clinic in very relaxed surroundings or you can hurt yourseld permanenetly. However, if you want to do a veggie juice fast, that would be fine, you might like to do occasional days on water.
Good luck!