NanoTank

I'm looking to convert my freshwater tank into a nano marine tank. I have a 5 gallon tank, and after reading lots of information, and it not all being consistent, I have some questions about filtration and stocking.

Would live rock be enough, I've heard that about 1 lb per gallon is the right proportion, is this correct? If I put in 10 lb's would that be enough filtration or would a protein skimmer be required as well?

I have an existing internal filter which I can use for water movement.

All I planned to put in were a pair of clowns. Perhaps adding a suitable anemone for the clowns at a later date, when I can afford the new lighting system?

I've also seen this book: The Nano-Reef Handbook by Chris R. Brightwell and was wondering if anyone has used it and thinks it a sound investment.

Any advice or tips would be useful.
Thanks

JohnnyOcean

If you just plan on having a FOWLR (fish only with live rock) tank then live rock only will be fine. Pristene water quality is generally needed for delicate livestock like corals (SPS/LPS). Skimmers aid in water quality but general maintenance (water changes, using RO/DI water source, etc.) cant be beat.