I believe you are right, Zoa pox can happen with or without carbon. I feel that it has something to do with the change in water temp or is just runs a yearly cycle. In all, your guess is as good as mine. But, I try to be cautious and try hard to prevent them.
For the past month or two we have made sure not to bring in hardly any zoas at all. This way when it comes to putting them in quarantine we have little to worry about. We will be using a large rubbermaid, its about 75 gallons or so. This way its really easy to do a 50 percent water change every other day.
If you or anyone decides to quarantine it is recommended to use new saltwater in the quarantine tank, not water from your display tank.
For the past month or two we have made sure not to bring in hardly any zoas at all. This way when it comes to putting them in quarantine we have little to worry about. We will be using a large rubbermaid, its about 75 gallons or so. This way its really easy to do a 50 percent water change every other day.
If you or anyone decides to quarantine it is recommended to use new saltwater in the quarantine tank, not water from your display tank.
