We had to do a complete water change and did a thorough cleaning of all equipment. Vacuumed and cleaned glass inside out. We were lucky to get some salt water that was 1.025 salinity. Unfortunately, the acan had to go.
I did this video/timelapse of a reef tank at my work(public aquarium). 4 years progess. Tomorrow is the last day it can be seen by our visitors, due to our rebuilding. We will be closed for a while. It'll be a bit sad to take this tank apart, but in 2021 will will open again with new and larger tanks(we will save all the corals and fish while we rebuild)
Not the best quality on this timlapse, but I did it most for fun.