Hello! I need to create a bubble bath for a shoot this week, does anyone have any advice on how to make a bubble bath both VERY bubbly and also any tips or tricks to sustain the foam/bubbles so they last for a bit? Ideally we only fill the tub about 1/4 - 1/2 way full and then the rest would be bubbles (due to constraints of the bath/at location - it cannot be filled all the way) so want to make it look as full as possible. Thank you in advance :) Additional info: talent does not have to be IN the bath! Thank you!