I have a small 20 gallon freshwater tank set up at my office, and my plecostamus is getting way to big, so i decide to donate him to a fish store and get a smaller one. so petco is 30 seconds away so i decide to go there. i start talking with the fish guy there who showed me a long tentacle anemone (clearly not a lta). then he told me i should keep my specific gravity at 1.18. then i told him i dont want to kill my corals, to which he replied 'your live rock will be fine'. then i said im not worried about my LR im worried about my corals. then he preceeds to tell me that live rock is a coral. then i left. nice guy though.