Richard over at Great Reef tanks listed some successfull keys in keeping a small pico reef aquarium. Total volume is only 2.5 gallons. There are five keys in total and they include: 1. Very minimal bio load, 2. Frequent water changes, 3. In frequent feeding of coral, 4. Regular fresh water top-up each day, and 5. Keep your entire system simple and have patience. Looks good Richard!