New 20 Gallon Reef Tank

[MMAX]

Hello, I'm a new member and this is my 1st post in here. I recently started a small marine tank after about a year with freshwater fish. I still have my 55 gallon freshwater tank but decided to start out with a small 20 gallon for salt. It's been running for about 2 weeks now and I have 6 pieces of live rock with 10 hermit crabs and 4 snails working overtime to keep them clean. I don't plan on overloading the tank with fish--Maybe 1 or 2 clowns with an anemone and a couple of cleaner shrimps. I'm just wondering if I should have more live rock.