changing from reef to fish only?

[Salmon King]

I would change the bottom to crushed corral .As for live rock it depends on your choice.The live rock acts as a filter if not you have to go extra mechanical.You can make a tank look pretty good with dried corral.I have had both and they both look good.If you are ever in Victoria i have a ton of dried corral.As of a skimmer it doesnt matter one whay or another.Water changes of 10 percent a month is good.I would use chemipure as you only have to change it every 3 months or so.Some people think because you have live rock in a fish only tank you cant medicate.You can only you won/t have corraline algae growing.The bacteria in the rock will not die from this.