Saltwater Questions - Beginner Here

[Reef-junky]

A flame angel is to big for a 20g tank and it could eat your coral.

https://m.liveaquaria.com/product/444/?pcatid=444

 

[Reef-junky]

In all honesty I would get a 40 breeder you will be able to have some more fish and it will be easier to take care of.

 

[Reef-junky]

This is a little dated but you will get the idea

This is for angelfish

https://www.google.com/amp/s/www.ra.../selecting-and-caring-for-saltwater-angelfish
https://m.liveaquaria.com/category/16/
This is for Tangs