Thank you very much for listening to my advice, it helps me rest at night :) I'm really not kidding you! Haha :D
I'm glad Pearl is feeling better! If you want Mr. Betta to be even more happier, you could get him a 3 gallon tank at Wal-mart for a pretty cheap price that comes with a filter, all you need is a heater! Here's the one I have: http://www.walmart.com/ip/Tetra-LED-...-Pets/20693135
of course, I got mine on sale for 21 dollars, but it's a fairly decent tank! I like the lights too.
And I think this is the tank you have already? If not, here's something that would REALLY make him happy! http://www.walmart.com/ip/Aqua-Cultu...-Pets/20693704
If you put a snail in there with him, he would be oh so happy! I could tell you, one of my boys was in a 3 gallon and he hated it, swimming back and forth all day long and all night long sometimes too! Until I put him in the 5.5 gallon, now he absolutely loves it!! I can't even express how much he loves it :D But don't worry, he'll be very happy to be by himself and to see you everyday. They like their humans too haha
Oh, if you get the 29, no it wouldn't be good for him to go in with the girls again because your girls will get Eggy again. And you definitely don't want that too happen, it doesn't matter how much space you give them. The male should never be with the female, it's just very unhealthy for them and you don't want unhealthy bettas, right? :)