Celebes rainbows are either good or bad. If you get a good batch they do well. If the fish are not good, they all die. They need hard water with a pH above 7.0 and a bit of salt.
The red rainbows don't look like Glossolepis incisus and could be a hybrid or G. multisquamatus. If the shop doesn't have a scientific name for those fish, then be careful buying them because lots of breeding cross breed fish.
The turquoise rainbows (Melanotaenia lacustris) look ok and are usually a true species (not hybrids).
Yellow rainbows (Melanotaenia herbertaxelrodi) can be hybrids but not always.
The first picture of Melanotaenia boesemani has a fish in the top left corner that looks like a female Glossolepis incisus. Most of the other fish in the tank look like male M. boesemani. Females don't have any yellow.
You can mix rainbowfish species together and they hang out together. I had 3 or 4 species in each tank and they all showed off and displayed to one another. When I wanted to breed them, I moved the fish to breeding tanks for a week before putting them back in the main holding tanks. Just try to keep species together that grow to the same size. You can have 4-6 M. boesemani with 4-6 M. lacustris and 4-6 M. herbertaxelrodi together in a 4ft tank.
I'm sure I can find out about the"Red" ones.
Thanks