I would ditch the anthias because of tank size and the fact they like to school. Add a couple more blue chromis instead. Also, the yellow clown gobies don't pair with shrimp. A yellow watchman goby will pair with a pistol shrimp. However, pistol shrimp are secretive (in other words, seldom seen) and can be aggressive to other ornamental shrimp. I'd look towards a skunk cleaner shrimp (or other ornamental shrimp) instead.
Don't skimp on lighting or the skimmer. I'll go so far as to tell you to not buy a Coralife Super Skimmer or a Sea Clone. Although they're easy to find and often inexpensive, they are generally not very good.
Don't buy Marineland "Reef Capable" LEDs. The name is a misnomer. I'd strongly consider investing in LEDs over metal halides or T5 HO
. You can get inexpensive LED
lighting (search Taotronics on this forum and on eBay) that will do the job, last for several years, run efficiently, and never require changing a bulb. A business loacl to me, Chester Aquaria, has a VERY nice programmable fixture that they have over their four foot display tank at a very good price. Lighting is often the most expensive component of a reef aquarium.
Strongly consider an RODI
unit. Failing that, you'l need to buy RODI
water from a grocery store or your LFS
. Unfortunately, many of those vendors don't change their filters frequently enough, so you'll need to test it from time to time with a TDS
Invest in a quarantine tank. It doesnlt ahve to be eleborate. Mine is a 10 gallon with an Aquaclear mini filter and a powerhead. Each fish goes through quarantine (QT) for at least two weeks (longer is better) before going in the display. Read through sick saltwater fish posts for all the stories of folks losing their fish collection to marine ick. A simple QT system is the price of two mid-priced saltwater fish. you cannot effctively treat sick saltwater fish in a display aquarium for ich, which is the most common ailment.
As far as a sump, I'm all for it. Here's a video I made explaining mine.
Aquarium sump explanation - YouTube