@BARBRI ... I'm just now reading your thread and one thing that is very plain to me is that you are not taking on board the idea of allowing your knee time to heal. Now that you've had an MUA, that restarted your recovery time clock, so please don't even think about the initial surgery when you are counting "so many" weeks "out." Recovery started again with your MUA.
You need to stay off the elliptical machine completely for at least 3 months. Using the exercise bike twice a day is fine, but no more than 5 minutes at zero resistance and a speed of 5-8 mph. Water exercises are okay too, but you shouldn't do them longer than 15 minutes the first week (this week). It is very easy to overdo things with water because it feels fine during and immediately afterwards. Many times the pain comes a day later. If you're still feeling pain at the end of that first week, stop everything and don't go to the gym. Just do gentle bends and stretches throughout the day at home until the pain lessens.
Don't do these exercises (with the exception of the 5 minutes on the exercise bike - that's okay daily) every day. Every other day is fine or even every two days. Your body needs at least one day in between to recover and for you to assess the impact of the exercise on your knee. Stay on this limited exercise program for at least 4 weeks. When you're not exercising, do no extra activity like errands, going out to dinner or for visits. You should be elevating and icing your knee as much as possible and just doing normal activity (walking about every hour or so) around the house.
If you continue to irritate your knee by overdoing exercises, you risk developing a chronic pain condition that is very difficult or impossible to overcome. Please don't do that to yourself. Your knee is now in the early stages of recovery from that MUA and it needs to heal. Stop feeling guilty for putting your health and well-being ahead of a gym routine. There is plenty of time for all that once you are at least 6 months out from your initial TKR.
I suggest you go back through your thread here and read all that has transpired. When you read the chronology of your recovery so far, it's pretty easy to see the problem is that you have been impatient and not willing to listen when your knee is telling you to slow down. Your knee heals on its schedule and not on yours, your surgeon's or your therapist's. Your ROM is actually fine for this point.
I apologize if my post seems a bit blunt. But I am concerned about you risking a chronic pain condition if you continue to overwork your knee.