It's a 92 corner bow. The red one is an erectus. The yellow ones on the right side of the first pic are reidi's and the slender one on the second pic is a barbouri. I have 12 horses total.
With the scissortails make sure you get a group (at least 3) other wise they are skittish and tend to hide all of the time. There are other dartfish (blue gudgeon, bar gobies) that you could look into but I think the scissortails are the coolest of the dartfish. Very elegant in the way they cruise the tank. Although you can mix any of those dartfish, all very very peaceful.
As for macro's. I don't know the names too well. The red one on the upper left is red grape somthin, the green grass like stuff on the sandbed is caulera prolifera, the others I have know clue.
The prolifera is usually grow in alot more so that it looks like a seagrass bed but I had just pruned it back before that pic was taken. The horses really like it. Given a choice, the horses prefer the macro's to the gorgonians. At least all of mine do.
Mixing SH species is really not recommended do to bacterial problems. It has not worked out well for alot of people. I've had no issues maybe because of the larger tank and cooler temps or maybe just luck. So keep that in mind.