lagoon tank

Want to run a 4G shroom tank (magic carpet, candy crush, and jawbreakers) Tank Dimensions are 12in x 12in x 6.5in What light do y'all recommend that won't be too strong for this tank?

I found after 12 years of decreasing tank sizes (33g, 24g, 10g) that my interest was decreasing as well. My last/current tank has been somewhat difficult to maintain due to its small size, no sump, and because it has a bare glass bottom. I was thinking about getting out of the hobby. But then...

I currently have no fish in my lagoon tank and possibly might prefer no fish. I know ammonia is a major thing which feeds corals which fish produce. I top off my tank with tap water only treating chlorine and not the ammonia in the water. Has anyone kept an all reef tank with no fish...