I have a tank that's about 1 year old and all readings (other than Nitrates) are perfect. I have a Yellow Tang, an Arrow Crab, an Aruba Damsel, Skunk Cleaner Shrimp, Percula Clown, Barbed Golby and 2 new additions (Med Tenticle Anenome and an starfish --- sorry, not sure what it is). -- Of...