Nice pics showing the whole cipro/QT process, that is something I was not familiar w/ in treating new mags.
Hopefully yours comes back, looks like it's on track.
As to your clarki and cinnamon, I would choose one or the other, and sounds like the clarki is already interested in that nem, and maybe find a mate for that clarki, just a suggestion.
Yes, I am in the process of bringing back a bleached mag.
I too used to subscribe to your theory on keeping multiple species or more than one pair, and understand seeing this done increases the wish to do so, but as most find out over time, it rarely if ever works out long term.
Pretty much always when they mature and begin to spawn is when it goes bad, and it can go really bad over night, learned that the hard way a long time ago myself.
1. Is your TT condition good?
2. Do you have another anemone in the DT?
If the answer is no to both or no to Question 2 then I get him to the DT.
Was doing well for about 3 weeks or so and then a few days ago it's mouth gaped open after I fed it for the first time "I fed it a cube of phytoplankton, inserted via syringe after the cube was thawed" and never closed back up, it wasn't expanding and was making a sort of taco shape, tentacles were still full.