Day trip to spa and indoor pool?

Hi there, I recently posted a question regarding anywhere we could use an indoor pool. We are travelling in December and our accommodation only had an outdoor pool which will obviously be too cold I had a few replies suggesting a waterpark which has an indoor pool however on the reviews a lot of people said this was women only and we are a couple male and female and I would want my partner to come swimming too.

Now we are thinking of perhaps a spa day which also has an indoor pool, any suggestions? We are staying in the red hotel marrakech and willing to travel to somewhere in marrakech with a budget of around £50/£60 for the two of us

Any help would be appreciated, thanks