Hey thanks that was quick !
My tank is 55 gal, and 4 months old.
Up until today, all my levels were perfect. Don't know what could have changed the quality. _________ 
Fish only aquarium: 55 gal. Bio-Wheel Wet/Dry Biological Filter and the use of Pura Complete and a Nano Skimmer : Fish: Yellow Tang, Pacific Blue Tang, (2) Percula Clowns, (3) Green Chromis, Skunk Shrimp, Cleaner Wrasse, (5) Hermit Crabs, Yellow Tail Damsel, Four Stripe Damsel. |