After a great summer its time to focus on the tank more. I did manage to keep up with maintenance and bi weekly water changes but did have a few losses over the summer. I lost my Yellow tang, tomato clown and a PJ cardinal. Unfortunately they ended up buried in the rock work and I have not been able to get them out. I am assuming the lobster and pistol shrimp have been eating well. SO of course my nitrates went up and I started getting some hair algae. Working on controlling that with more frequent water changes and phos ban changes. My biggest concern right now is I have lost a few corals. Two very nice chalices being the hardest to take. They started to recede before any of the other issues started to occur. So possibly the fish died due to whatever had affected the chalices. Oddly some of the other LPS and SPS are thriving so its a bit confusing to me what may be going on. I was thinking about taking out all of the rock and rinsing it in salt water, at the same time I would do a serious vacuum of the surface of the sand bed. I'm just concerned that all of this movement may stir up too much detritus and nasties causing the tank to crash. The question is... should I attempt the total tank clean up? Or just continue with frequent media and water changes and vacuum out only what I can reach?