i have a 20g tank that i would like to turn into a nano
what kind of lighting should i use..the tank i have now was an old freshwater tank that we had in the basement and the hood only has room for one lightbulb..should i bye a new hood or what ??
What do you plan to keep? If you only want fish then that hood should be fine. There's more to it than just that, though. Tell us a little more about what you have in mind.
The lights more than likely will not be enough for any corals. I would start with the fish and then look at your options for lighting when you are confident with your setup.
Have you ever had a marine setup before? You know the whole spew about cycling, filtration options, maintenance, and all that?
I have a few good beginner books to recommend, if you haven't read any yet.
If it's a 20long then some powercompacts would be more than sufficient. If it's a 20Tall, PC's would work, but I'd personally look into t5's. But I like more LPS in my tank than shrooms.