Yes- I know- but I worried that there might be something left behind by the star. The qt reads zero for ammonia & nitrates.Did you see my thread in Invertebrates? Some weird things are happening in my reef tank since the star was sick- (2) sarcophytons closed and slumped over, orange fungia- receding, small acans closing, and alveopora mostly closed today. The rest closed yesterday, or day before. Pectinia, caulustreas, open brains, goiopora, orange sponge, giant squamosa and fishes seem okay. I read a slight amt. of ammonia in tank after doing a 25% water change today and yesterday. I'm running Chemi Pure and carbon, also added Prime today after I saw the reading (like Amquel)