Yes fish guy had recommended new life spectrum to me too, but however after lots of researching, new life spectrum seems not to be that popular in the world, so I might try the tetras first and then try the new life after.
I have merged your two threads on the same topic together, so it may read a little funny. Next time if you accidentally have two threads on the same topic, please pm a mod to delete/merge/move the threads together. Thanks!