Well I know how to do realistic bubbles. I did blobby surface particles then I adjusted my water shader(refraction 1.33 to 1.3) Then made the thickness to like .2 or .15 Then adjusted the size ,speed,added gravity,air drag and some turbulance...
The thickness makes it look very realistic need to somehow add a rainbow effect and something like when the bubbles hit the ground they pop.. Well hope my newbie tweaking helped..