hey guys/gals i need help with my 55 gallon i just converted from a ugf to live sand about 3in bahama arag i have 1 yellow goby ,1 red scooter blenny ,1 candy cane coral and 1 toadstool coral parametera are ph 8.2 , nitrite o , nitrate <20 ,ammonia 0 , temp 78 yet i cant seem to keep newcomers...