You can drown with plain tap water right out of your sink whenever you are ready to submerge her. I would recomend on feedin her nutes till about 3 days prior to starting to drown her too. Trust me your bud will be fully cured and no sign of nutes will be in your smoke. Just prior to doing it, shoot me a PM if you have any questions, seriously no question is dumb and if I dont know the answer I will def get someone in to answer it.
My 2 cents on trimming: Dont do it, Mother Nature doesnt trim her bush cause she is a "Natural Woman" Especially fan leaves, I tried it and its not going to double your yield if you do so. If a leaf is dying all you have to do is give it a tiny tug and if it comes off then fine, if not, leave it alone. Some strains are very good canidates for lolipopping but I try to be Father Nature with my girls and let them do their THANG!
Peace
BKB