I used vitalin a couple of days ago, to good effect, but before hand i made up a mix of groundbait at home, balled it in a jug and left it to watch how it acted in the water (less the attention of any fish obviously)..it looked fantastic, as the ball broke up bits and pieces rose up and settled at various levels...not a very "real" experiment i know, but gave me the confidence to give it a go with some small (3mm)pellets added for good measure, and i got a (non commercial) PB... (12lb common) well chuffed!....if only my club water would allow mixing in a few particles too!...