So the dreeded going out of town and leaving your reef in the care of someone else and returning to issues has struck. It is not as bad as some of the things I have head over the years, but I still have some worries and I am stumped on what is going on.

All my fish are intact, but my ricordia and rodactis have evaporated. Just gone. Also the coraline algae is starting to turn white in areas.

I have tested everything and all seems well. The temps and salt levels are and were reported fine. Usually fish go before these other items if something is way off. I have done a water change for safe measure, but since I can not idenify the issue I hardly know if it has been addressed.

Any Ideas?