So, I just sold my 5 glowlight tetras.... I'm thinking either Celestial Pearl Danios, Rumy Nose, or Long Fine White Clouds.... I could always do another pair of killis, but I think I'd only do 2 more... I'd also be worried about a ratio of 2 males to 3 females. Not a terrible ratio, but I've always liked it to be at least 1:2 or even 1:3.