Mandarin - To add or not to add?

[dc4]

I have had a female mandarin for about 9 months now, eats frozen blood worms. Adding a 2nd male mandarin which is not trained and both are still doing great. I did seed my tank with a few thousand copepods I picked up in the states and now it seems the macro algae fuge keeps the tank stocked with enough to have them both fat and happy. The female has been preggers for a few months now too. Nothing bothers the mandarins, except for the ywg at times. Even my ex-devil reincarnated saddleback female left it alone and it leaves nothing else alone, didnt even bother the mandarins when they got close to her nems. I swear, mandarins are the most peaceful fish you can get for our tanks, favourite things in my tank by far. I say get one and if something bothers it, get rid of the fish that is bothering it.