I know it is supposed to be in low light but will it be happier if its base is in sand or will it matter?Also, I put it in the tank about 4 hours ago and it looks like some of its "arms" are drooping. My readings are: nitrites 0, nitrates 5-10, ammonia 0, ph 8.2 and salinity 1.025.Does this mean something is wrong with it?