Occasionally, as in rarely, I go in the pool do do scissor swimming (don't know what else to call it). On my side, I just forcefully scissor, kind of like bounding actually, and then I relax after each one as my body propels itself forward. This works out my hamstrings pretty well. Can do it on your back too but you dont scissor, ou just do a forceful kick like a dolphin or a frog.. i dno how to describe it.
I's basically swimming's equivalent of "striding" in sprints, whre you just take long powerful strides and don't worry aobut runnign as fast as you can.
Other than that I don't do them because I don't have any weight but if I could get a kettlebell or a squat rack in there and do some deads and front squats and jump squats it's be way better. Has anyone deadlifted in a pool before? That would be my new favorite. I would neevr deadlift on the ground again if I could deadlift in a pool. edit: well sorta
I've done those vandersteen squats, but only in a half squat position. Again without weight I didn't feel like maknig a routine out of them.