My return section in my sump ran dry while I was on vacation which in turn stopped flow into the Refugium. The temp dropped to about 71.7 degrees for about 6-8 hrs. I have dragons breadth and chaeto algae in there. The dragons breadth looks a bit pale - chaeto looks ok I think. I still see pods scurrying around - so I think I may be ok. Does anyone know how tolerate macro algaes are to low temps? Miraculously my return pump did not burn out during this time and was operational.

