Bartlett Anthias new male with 2 females

[Enki]

I have one Bartlett's Anthias that is by himself in a tank 1 3/4 long, who is most likely a male.
I have three Bartlett's Anthias they range in size from 2 1/2 for the small 2 3/4inch and 3 inch long for the large in my display tank. Yesterday when the lights turned on, the male, 3 inches, started swimming violently and rapidly around in circles and then died with his mouth open. I thought maybe he was just stunned at first so I floated him in my sump for 30 minutes and he just laid there dead. I pulled him from the tank. I think maybe he got startled when lights turned on hit something in the tank and killed himself. Also a few days before this happened I was trying to take a Red Head Solon Fairy Wrasse out of the tank who was getting thin from not eating enough. the wrasse wasn't as aggressive as other fish who were all eating well. He was hiding in a large section of live rock which I tried pulling from the tank, but I could not get him out of the rock so I replaced in the tank. I still have not seen the wrasse and think he is dead.
So, I may have done a number of dumb thing here like: Wrasse died in tank and spiked nutrients. The Live rock I pulled out, for less than 5 minutes, is Pukani and when I put back in there were lot of air bubbles. Recently I have been using the feed cycle on return pump, so the Red Head Solon Wrasse can get at the food easier, causing my sump level to rise causing my skimmer to overflow with wet skim dumping nutrients back into my tank, happened a few times in the past several days until I turned off skimmer before the pump.
All other fish seem fine.
Any Ideas what killed him?
If I add the smaller male Bartlett's Anthias with the females will they kill each other or will they get along? Or what are my other outcomes from this situation?

 

[davocean]

Usually adding the smaller is not an issue as young anthia are female, not male.
You definitely do not want more than one male in your tank, but from most of what I see bartletts especially can be a bummer in this area as it seems they often all turn male and usually become aggressive w/ each other.
As for your other issues, I would not be too concerned about rock pulled for 5 minutes, a skimmer overflow is a bummer but not major unless it really was loaded and in a small tank, but I would do a WC and carbon if mine overflowed.
Goby's often dissappear, I had one missing for almost two years once, so there is hope.
Moonlights, especially controllable ones are awesome for a warm up/cool down as to not startle fish.