Cute cats as always! On the brochis, I would have guessed male on both the female & baby just by the fancier tail shape. The female does have "girlie curves" (chubbiness) & looks larger than the male. Nice the female gets some flashy finnage compared to many fish species.
Maybe you need a couple vals in that corner to hide the tank seal? Though it might be hard to control to just a few. Besides, I like a less naked open swimming end. I think it's the dead stop of plants. That may change after a bit. Well, my tanks are mostly jungles due to lazy gardening. So who am I to say? I keep hoping some of your aquascaping zeal will rub off once in a while. But not too often, lol