well the 2vho's are less than 6 months old and the metal halides are new like 2 weeks old my nitrates are on my test kit it is never over .05 and fish I have a foxface,yellow tang,sailfin tang, kole tang,3 blennys, a 3 bar,a purple fire goby,manderin goby,2 blue dams,3 star fish and 150 crabs...