its skeleton is showing around the edges of 3 of its 7 heads. i recently moved it onto a flat rock bc my diamond goby sure does like to sift the sand and drop it all over the lobo. any reccomendations? i feed dt's, zooplankton, prime reef, and super brine (not all at once of course). it was solid red when i got it 6 weeks ago and has started to turn red with lavender around center. ive read that this is not uncommon to change color when put in different tank. does it need to be placed horizontally in tank or can i lean it on the rocks so it sits kinda vertical? my magnesium and calcium were a bit low a few weeks ago but i have since fixed that problem. any help to my situation would be much appreciated!!! its quite a large beautiful piece and i would hate to lose it.