So a update and plans:
Lost the ritteri nem while I was gone on vacation. The run in with the wp40 didn't go well. I'm on the fence on getting another nem or just giving up on nems all together.
The hyposalinity isn't going well this round. I decided to give it up and start treating with paragaurd by seachem. I've lost the Wyoming white clown only so far. My regal angel is swollen and swimming upside-down for the last two days. I sure hope the paragaurd helps.
I'm gonna rip the 240 apart, dry all the rock out, wipe the tank down, pull 100% of the sand and allow the tank and plumbing to dry out (serializing the tank). Gonna drain the sump and fuge too. No ich, xenia or aiptasia anymore hopefully.
Taking all coral, shrimp and fuge matter out and putting them in a 29g I use for top off. Hopefully all will be ok for the length of the dry out of the dt and then recycling it for 4+ weeks. Got to figure out if revive kills ich (when I'm able to return the coral after the cycle). Also got to figure out what to dip the fuge matter in to remove any ich then as well.