just curiously… was the affected Halimeda near to the outlet/return?
Whatever is leftover is left in the open bucket under the tank for top off another day. I hope this works because I hate to have to add even the noise from a small air pump to my small house just to bubble the make-up water! I have no corals, but do have live rock and some inverts and macroalgae in the refugium and a few up front in the display (if they survive my abuses). Low maintenance is really important to me, which is why I went for the algae scrubber filter to begin with. I tried to find everything about the Kalkwasser slurry from the faq’s and I will go get your book and skim through that section.
