i just aquaired my first micro frag about a month ago and i cant seem to keep it happy, it usually has its feeder tenticles out and willing to eat, but recently ive noticed it not being soo full and puffy im wondering if its too low in my tank its on the sand bed about 30inchs under a 250 10k mh and 165 vho actinics. should i move it up? and while im at it i cant seem to keep a certain acan happy either do they require more light too its also on the sand bed but more directly under the mh