where should i place this

if thats a flower pot, (goniapora) it needs to be feed directly with phytoplankton at least once a week but more often would be better, I find they also like mysis oil, when you feed mysis dont rinse it, they like high nutrient water and need low mild gently swaying current, the do well under vho,pc, and halides, they dont need really intense light
if that specimen is around 4" long, it should be around 7-8" diameter when extended...