Got all but 3 rocks out of the DT. Gonna scoop as much sand as possible out tomorrow, then I can medicate. Found my nitrate and phosphate trap... I used crushed coral under the macro in the sump and could never siphon it out. The smell is unbelievable!! I'm actually surprised I didn't have a crash in the year it was collecting nasties, because the smell alone tells me that this is where almost all the organics went. Well... Mistake #1 fixed!!