So i'lll start by saying my tank seems fine everything is doing well, minus my pulsing xenia, which were doing well a few months ago, but slowly have noticed they aren't open or 'pulsing' ive tested my parameters and the phosphates seem incredibly high per normal standard, but nothing has died, i don't feed reef roids often, and everything seemingly is doing well. I'm using a Hana digital phosphate checker, and am following directions on the manual, the color of the water changes from clear to a very faint blue color and the meter reads .85. I manage a clients tank and have seen his turn a deep blue color and come up with nearly the same reading. I plan to check again, to make sure i did everything correctly. I'm not one to chase perfect numbers, but also dont want the phosphates to get out of hand. What are your thoughts? Parameters as of tonight are below.

Temp- 74, Salinity 1.026, pH 7.8, ammonia .25, nitrite 0, nitrate 0, calcium 532, phos .85, alkalinity 6.8