they do best in a species tank or a tank with tankmates that wont bother them. you NEED to have space for at least 6, with 8 being better. glass catfish can be easily outcompeted for food and then they will starve.
if you can have them or not depends on the tetras and the size of tank you have.
if you can have them or not depends on the tetras and the size of tank you have.