I am fused from C3 to C7 and have had reconstructive surgery from L2 to my pelvis all within the last 15 months.
As everyone mentioned above Consult with your doctor/surgeon. With that being said, I can tell you from extensive personal experience, is significantly easier to move your body in the water, then out of it.
I have used what we call "aqua therapy" around here to both prep for and rehab after surgeries (I just had my 12th spinal surgery since 2002).
My surgeon just completed the last part of the cervical fusion on September 13th which began on August 12th (in all he installed in front 1 spacer, 4 screws and 1 plate in the back I got 2 lifts, 10 screws and 2 bars). We have already made the plan that as soon as the 22 Staples come out of my neck and the wound heals. He wants me in the pool. That is music to my ears.
As far as PT goes, I start that next week. The group I use has an app that connects to my Samsung health app to track steps and sleep, as well as, what exercises I need to do.
It evens gives me direct contact with my surgeon & PT staff.
I attached some photos of the work I had done I do not recommend it.