So, one day I went to a really far out LFS (about an hour from my house),and I saw these cute little fish called Peacock Gudgeons. I did some research online and it says they're compatible with boraras and dwarf gouramis. Right now I have a 10G with two gouramis (Male & Female) and I think 8-9 boraras (mixed species). I plan on getting maybe 1 or 2 but I need to know how to sex them so the males won't get territorial and kill each other. Is there any other info I need to know about keeping these guys? Thanks.