Well I've finally come to the conclusion that I need to take the appropriate steps to kick these AEFWs out for good. Thankfully I have a ton of support from members of our local club, some of whom have offered to house/back-up corals, others who have been great sounding boards for coming up with a solid plan, and others who have given me much needed words of encouragement.
After clearing out as much room in the off-line frag tank as possible, I'm going to start cutting the acros off the rockwork and moving a select group of corals over to it. Other, more prized acros, have or will be going to friends for backup and others will be going to a friend who has an 8'x2'x1' frag tank ready to QT corals. Finally, there are a good number of acros that are ubiquitous here in Phoenix, or at least among my closer friends, that I'll just toss what's in my tank and replace later (we've got a great network of local hobbyists!).
Next, I'm planning to use a combination of Kalk paste and AquaMend epoxy puddy to kill off the encrusted portions of the acros. That's going to be a big job and I'll have to take it slow with adding epoxy so I don't freak out the system too much. Similarly, I'll also have to monitor the parameters closely because of die off and the decrease in uptake of Alk/Cal/Mg/etc.
The acros that will be going into the off-line frag tank will get dipped in Bayer every 5-days for at least a 40-day period. After 40-days, I'm planning to reassess how the acros in the frag tank are responding (looking for signs of bite marks, visually inspecting dip-water, observing polyp extension and color, etc.) and I'll decide then whether dips will continue. I'm not kidding myself: I'm sure I'll lose a huge number of acros during this ordeal but I keep telling myself that their chance of survival is currently very low and--most importantly--their chance of thriving is 0%. Once I'm certain all of the acros in the main display are dead, I'll wait 60-day or so before adding acros back into the display.
So with all that said, I figured I'd take a final FTS. It may be several years before I'm back to this stage but I'm hoping this tank will be standing and thriving years beyond that so I'm telling myself that it's all worth it. Admittedly, not at it's best here, but this picture will serve as motivation for me moving forward.
If you have any thoughts on how to tackle this differently, please feel free to comment.
Wish me luck!
- Z