enema questions

i was reading thru old posts about enemas and i have a couple of questions

1.should i continue doing my colon cleansing to remove fecal matter for that will interfere with coffee enema

2.what is involved in a pre-rinse, and could i use well water...i read in a book that using well water is ok

i have only started colon cleansing for a little bit over a month and i havent seen any fecal matter/muciod plague....so i wonder as for me just doing regular enemas or continuing doing my colon cleansing is the way for me, i really need to build up my strength and plan for a parasite cleanse for i know alot of my problems are them causing it