Thank you everyone. It is a tough hobby to get a full grasp on, and such mistakes only serve as (expensive) reminders. Based on the size of the tank (about 100gal on top plus the refugium) I was told I would be more than fine hosting that many fish. I acclimate the fish using the drip method, and I test for PH, Nitrate, Nitrite, alkalinity, slinity and calcium. I test myself and I also have my local store check once a week. I suppose my biggest mistake was introducing that many fish all at once. In your experience, what do you find to be a good period between introducing new fish? Is it better done after a water change or in between - or does it even matter?
Finally, a bit more detail on the system: The tank on top has dual compact lights and a metal halide. The water goes into the overflow and passes through a felt like cloth, then goes into the refugium where I have Fiji mud and a type of caulerpa (with a light that's on 24/7). Live rock of course for the reef, and a couple of powerheads for movement. Finally, the protein skimmer use to run 24/7 also, but someone suggested that I may be overskimming and killing corals like a toad stool I lost, so I placed it on the same timer with the halide. I welcome any suggestions.
