Getting a smackdown education. The following facts didn't add up in my head 'till this morning:
1. I had a skimmer overflow 4-5 days ago.
2. Female had a couple scales scuffed for about the last three days. I thought it was because I break the bottoms out of the flower pots and maybe I didn't sand the rough edges as well as I should. I did a heavy display cleaning about three days ago too and swapped flower pots assuming that it would rectify the problem of sharp edges.
3. Having "slept on it" and being concerned about the scales getting worse, I took Tal's advise this AM and swapped the flower pot to one of my tile triangles.
4. I actually spent some time staring at the tank (I rarely take the time to do this.)
5. I came to realize that my female is getting sick as a result of the skimmer overflow.
6. Dropped a 7 gallon bucket of FW into the sump for some dilution (140 gallon system.)
7. Dropped the temp setting from 82 to 80. I will drop it to 78 tonight. I know many people have the philosophy that they should keep a high temp when fish are sick to speed the life cycle of any pathogens but I think the opposite. I want to slow the life cycle of the pathogen to slow it's progression and slow the fish's metabolism to reduce stress.
8a. I will also drop the salinity of the system to 1.009.
8b. I have not yet decided but am considering dismantling and cleaning the sump while running the display with a couple power filters till this clears up... or maybe as a permanent change to my approach.
Lessons learned:
1. I need to spend more time in front of the tank.
2. I am considering simplifying the system by switching to bioballs and removing the skimmer or #8b above.