I've got a blue male in the same tank aswell, now i know you'll probably say i shouldn't keep them together but they get on really well. It's a 200l with lots of plants and caves so if they do feel harrassed they can stay away from each other.
nothing in the 50l and in the 200l there is:
7 neons
4 black phantoms
2 gouramis
2 keyhole cichlids
2 kribensis cichlids
2 bristlenose
4 sterbais corys
i think the best thing to do is divide the 50l into 2 and put the male on one side and the female in the other with some corys or shrimp that or get read of one of the bettas or both the gourami
I'll probably get rid of the male siamese, he never comes out and is always under the filter. The two gouramis were my first fish and are about 2 yrs old so i'm gunna keep them. Thanks for the help and advice.
in the 50l tank you could put the female in there and get about 3 more and a few corys or shrimp but you need a groupe of females to spread out agression