How to prepare P&B shakes?

hey there...

i have just bought some pysllium husk powder and Bentonite powder! i just need to now how to make the actual P&B shakes. it says on the packet one should mix the 2 together and then leave it over night? then add the psyllium husk the next morning. is this true or can u make it and consume it straight away? im a bit confused and need someone experienced to tell me how to best do it
thanks

beginings