So, the day after I post how well things are going in my tank, I mess up my topoff system and overdose Kalkwasser. What actually happened was the settled bottom of the kalkwasser mixture was added to the tank, instead of the solution at the top. Not much was added -- maybe a liter at most -- but this morning the tank was very cloudy.
I changed out about 12 out of 55 gallons of water and added activated carbon bags to the skimmer return and tank. Any other suggestions for how to proceed? Most of the life (soft corals, inverts) seems to be OK at this point.