Your tig looks a bit swollen which is not a good sign
I can't remember if you were feeding prawns or not but yours does look like that's what he was eating
I know you say the cloudy water is down to the bad cam but it does look cloudy
If he is just swimming up the side glass this is normal but the flipping I found was due to the blockage from sea foods
You can keep the fonts in the tank I would just take the RTC out
You seam to be doing a lot of messing around just let the tig settle
Were abouts in London do you like