So after cycling my tank for about six weeks (live rock and live sand, die off from the live rock being shipped provided plenty of ammonia) my parameters were looking good. No ammonia. No nitrites. Tons of nitrates. I tested weekly and saw all the signs of cycling to completion. I waited another few days just to be safe, did a big water change, and bought six scarlet reef hermits on Wednesday. Friday I found one dead. Figured it was weak, sick, or stressed. If my numbers were that out of wack they would all be dead, right? Tonight I come home to find another one dead. I'm not sure what I'm doing wrong. I have plenty of diatom algae (new tank uglies) for them to eat, and supplement every other day with good pellet food in small amounts. Any advice is appreciated. Here are my current parameters. Temp 78 Salinity 1.025 Ammonia 0 Nitrites 0 Nitrates 20 (a little high, I know, but I've been told that it's not enough to kill them) I floated them for an hour, adding a small amounts of my water as they adjusted.