Rehab after surgery

[foxy01]

Hi, my horse underwent surgery for a fractured sesamoid bone in May. Surgery was successful, we are on box rest and currently hand walking 25 mins twice a day, built up from 5 mins twice a day. I have 2 questions:

Would hydrotherapy be useful for this type of injury ( there was some suspensory damage)?

She is due to go out on restricted turnout in 5 weeks time, what size area is recommended?

Thanks in advance for your advice.