Instead of the micro fish you could do cherry barbs! They are peaceful and very hardy, they can live in almost any water as well, so I would say get them.
Just a heads up. Your loaches need sand as they burrow into it, so if you are getting gravel or have gravel find something else. If you have a hone depot, they sell play sand that is completely aquarium safe, I use it and many other people on here as well, it is like $5 for 50 pounds.
Petco and Petsmart both sell plakats, they should be labled plakat, or at Petsmart dragon. Dragons have metallicy scales. Hard to describe easy to tell. All of petsmarts plakata should be dragons though.
15 Gallon NPT
1g no tech bowl in the making