Well the nem was not down deep in the sand and its foot was not attached to anything, so I took a yogurt container, cut out the bottom, sliced it so it was about 3" wide all around. I pushed the plastic ring into the sand bed till it sit snug on the bottom and used a turkey baster to take the sand out of the container so bare glass was showing. I then set the nem in it and turned off the pump. Within a half an hour the Lta was secured to the bottom glass of the tank. I then filled sand around it and it seems quite content for now. Heres another pic.