Kids want to add some color to 20g NANO tank. What are some good starters for them? They are very limited on budget since they are doing this one on own.
You may need to provide more information on the nano tank setup. If you want colorful corals than even with a basic system, I would suggest mushrooms, GSP and some zoo's.
Zoas are always good for color and cheapness. If y’all have a lower end light mushrooms like Rhodactis, Yuma, and the basic ones are gonna be happy in there. Lots of options