Here is a list of the type of Rainbows in the pics. They are in the order of the original post.
Tami River, Millenium Rainbow (Glossolepis Pseudoincisus)
Blue Rainbow, Lake Kutubu (Melanotaenia Lacustris)
Boesemani Rainbow (Melanotaenia Boesemani)
Running Creek Banded Rainbow (Melanotaenia trifasciata)
Goyder River Banded Rainbow (Melanotaenia trifasciata)
I have found all species of Rainbows to be very compatible together. I have other species also but haven't been able to get any decent pictures. I'll add to the post if I can get some.
My fish started coloring up at around 4 months, but really started showing nicely at about 7 or 8 months. I should also note that my tank is all males.
Here is a full tank shot, and another member of the commumity: The Roseline Shark, Denison Barb (Puntius denisonii)
I bought most of them when they were about 1.5-2.0" in length, not from birth.
When I bought them, they didn't look like much. For instance, the red Milleniums were tan and the blue rainbows were silver. Even as they started showing some color, it's a pretty slow process as the color fills out. The body shape also changes as they mature. Mine looked like minnows when they were young. They are still not full grown. Most are about 3.0" to 4.0"" in length right now.
The fish seem happy and the tank is very healthy. I run two Rena XP3's, along with two Penguin 660R power heads. Lots of filtration and current flow. I feed them New Life Spectrum, along with frozen brine & bloodworms.
For anyone who might be interested, I thought I would provide a link to a Youtube video of the tank.
I'm a little dissapointed with the quality I was able to get, as the video does not do justice to the colors of the fish.
However, it does demonstrate one of the reasons I went with Rainbow fish. They are in constant motion, do not hide, and live together very peacefully. Let me know what you think.