ok here goes.
90 gallon tank, one year old, 2X 150W metal halides (changed bulbs 3 months ago), skimmer, RO, chiller ( temp maintained at 25 C )
Nitrite,Nitrate, Ammonia, Phosphate all read zero. salinity 33 ppt sp gravity 1.025 and ph 8.4
The power heads and filter specs will post tomorrow -...