As it turns out it is .08 which indicates as Coral Growth Retarded (too high). What can I do the control this other than water changes (I change about 8 gallons every 7 days in a 72 gallon tank with 25 soft and 10 SPS corals which all very small-propagated tank raised corals). My tank has a Kent Nautilus protein skimmer and Kent Biorocker. It also has a 260 watt power compact which I am in the process of replacing with a 380 watt VHO hood. I am not sure if stronger lighting may make my Phosphate situation worse. Please let me know. Also, one other quick question. Today for the first time I noticed a strong odor coming from my tank when I went to do a water change. It smelled like rotten eggs when I removed the glass lids. It wasn’t over whelming but noticeable.