Thanks George. I'm not using a
skimmer at the moment. (Where can I order the good one for the nano?)
I have a light timer but it's an industrial 3-prong one and it always gets stuck, causing the light to be left on longer than usual. That's why I left it up to my roommates to control it. I'm sure they overfed them as well because there was still flake food floating on top of the water and extra food in the sponges.
Light is currently off to help reduce stress and also to kill algae...I'll have it off for the next few days as well. I'll do the recommended water changes every other day using distilled water like always...hopefully I can get this under control again.
I'm just so pissed off because the tank was in perfect health before I left. I had been performing weekly water changes,
salinity was perfect, coral was beautiful and healthy. Grr!
Thanks again for the help George.