Do your water changes. Use redundacy for water movement. be patient, Use maricultured or wild live rock and live sand. Use urchins for algae control. be patient. Use steel straws to remove nuisance algae with water changes (5-10% weekly), be patient, use appropriate lighting levels for the corals selected, keep an eye on pH, alkalinity, calcium and magnesium, be patient.
Here's a system similar but larger than yours. It was maintained for 15 years before being dismantled.
Here's some more links for your perusal:
Studying the effects of live rock in a newly established aquarium shows that high-quality live rock promotes the rapid establishment of an effective biological filter and a microbial community similar to those found in mature reef tanks.
www.reef2reef.com
"Coral Reefs in the Microbial Seas " This video compliments Rohwer's book of the same title (Paper back is ~$20, Kindle is ~$10), both deal with the conflicting roles of the different types of DOC (carbon dosing) in reef ecosystems and how it can alter coral microbiomes. While there is overlap bewteen his book and the video both have information not covered by the other and together give a broader view of the complex relationships found in reef ecosystems
Changing Seas - Mysterious Microbes
Microbial view of Coral Decline
Nitrogen cycling in hte coral holobiont
BActeria and Sponges
Maintenance of Coral Reef Health (refferences at the end)
Optical Feedback Loop in Colorful Coral Bleaching
DNA Sequencing and the Reef Tank Microbiome
Richard Ross What's up with phosphate"