Came down this morning to find my lipstick tang was dead, my urchin and neon crab was eating it,,,,,, we did a 10% water change yest as my levels were as follows,,,PH-8, PHOSPHATE-0.5-1,NITRATE-10-25,NITRITE-0,AMMONIA-0,S.G-1.022....should I do another water change and need advise as I'm new to...