No Carbon, no suplimental feeding of corals. Calcium Chloride and sodium bicarb along with a Ca reactor going full force to try to maintain ca and alk levels. Feeding per day as follows. One third sheet of sushi wrap per day. Gone in about 3 minutes and a walnut size piece of frozen fresh squid hand fed to the copperband. The Angels snatch their share of that. 30 gallon per week at least in water changes using instant ocean aged at least 12 hours with agitation after mix. Thats it. No other food. No suppliments. Most pieces in this tank i had before i set it up. Some are over ten years old. One of the carpets was an aniversery gift from my wife in 1995. All of the fish are over 5 years old with the exception of the golden angel. Secret to keeping copper band long term is hand feeding with fresh fozen squid or clams. He has been hand fed every day for bout 5 years. Secret to the powder blue, Koli, yellow and purple tank in same tank with each other is daily feeding with greens, ozoneo eliminate ich and large square tank. Used ozone for first couple of years to eliminate ich but dont run it anymore as there havent been any new fish added in years. Pretty simple. Low tech. Lasts long time.