reef tanks

Hi all! I'm needing some answers on my green wolf eel. We got him a little over a week ago. We finally got him to eat for the first time a couple days ago but he hasn't eaten again sense. He also just stays in one hole/cave thing and doesn't swim around. He pokes his head out a few different...

I just got my first fish tank and I'm completely new to this hobby, but I am extremely excited to get into it! I just installed a 40 gallon saltwater tank and I had the protein skimmer, fan and heater running for about 24 hours. I measured the salinity and its just about perfect for a reef tank...