In the past, I have used water from the display tank and for the first 3 days it should be okay in any case, but later there is a chance of reinfection if the pathogen is still in the tank. So I would suggest doing water changes onward from day 4 of treatment with new water.
This is a video of the anemones I currently have/had in treatment:
The anemones in the tank on the left are done with treatment for 2 weeks, the magnifica on the right is the one I have in treatment for over two weeks now. The green gigantea and the little malu (in the breeder box) were not really sick but just got treated along prophylactically.
This is how the magnifica looked only a few days ago:
Thank you for sharing that! What kind of filtration are you doing in those tanks? Or is it just movement via power heads?
I have my anemone in the quarantine. It started to perk up a little bit after I moved it. Once lights were out, I dosed 250mg of Cipro. Will assess in the morning. I'm hoping it pulls through this.