The salt water flush (if you do it) most drink it the first thing in the am. Moving your bowels within a 1 1/2. Having a liquid movement is normal..(for me anyways) It also usually has other waste flushed out with it.
From what I read.. The salt water flush is important to do because it flushes anything the lemonade has loosen up.
Some people choose to drink a cup of "Laxative" tea like: Smooth Move in the am and again at bedtime. Really is by personal choice.
As for the B & P Shakes... keep it down to 1 til your body starts moving. Then gradually work up to 2 or 3 etc.
Hope this helps somewhat, Tina