I have an assortment of inverts,all of which seem pretty healthy.All of my shrimp have molted in the past,my arrow crab seems happy picking away at the LR,and yesterday my girlfriend's 11yr old discoverd no less than 5 or 6 baby brittlestars.All of them were dug about 1" into the CC and pressed up against the aqarium glass moving thier arms.My green brittlestar's arms are about 6" long and I've noticed slits wide open on either side of all her arms.Does this sound like I have a water quality issue??? Have no idea why my yellow tang died the other day. 0 amonia 0 nitrites 0 nitrates.:biggrinbo