Okay. I'm stopping treatment.
None of my corals are looking that great, but what did it for me was the way my long-tentacle fungia plate looked. I know he's already high maintenance, but he's not doing good, and I worry he may be dead already. He's responding to movement (when I pick him up, his tentacles recede) but they're not really inflated and you can see his ribs around the sides.
As for the tang, you can no longer see the ich, but I know it's still in the tank. All I can do is add vitamins and garlic to the food to help everyone's immune system.
I know that Hippo tangs are very susceptible to ich and it must have really stressed him out with the moving of his 14g life to my house with him in tow (I did NOT transport him inside the 1/4full 14g tank - used a 5gal water jug with heater connected to power inverter in my truck). It was a 45 minute drive, and that probably wasn't fun for him. Then I got him home and floated him for 1-hr (left the lights on, another newbie mistake) then just put him in (didn't drip-acclimate - ANOTHER newbie mistake). Needless to say he's been through a lot this last week and a half. I think the ich could have been due to stress, but it's clear that I still know very little about this hobby so I have no real idea.
In the meantime, I'm going to get a QT setup and running in case I have any additional problems with anyone. Purchasing new livestock is at a standstill. I'll save my money on getting this 90g project going, and give it a good amount of time even after it's cycled before I add my existing livestock to it.
I could take my tangs to the LFS, but their tanks aren't a whole lot bigger than mine... one of the stores has 4x50g tanks, all full of fish already (he's better off with me, honestly. They have dead fish in their tanks all the time - it's bad). The second LFS is similar in that it has 8x40g tanks and about 50-60 of those little 1g tanks all in a row with a single fish in each one. They also are full of livestock, but I've never seen any dead fish there. it's a pretty clean operation. They were the ones that offered me the Ich-Attack so I'm questioning them now too. Lastly is a mom 'n pop store (great people) and they have immaculate tanks - 14x35g tanks, and 6x25g corner tanks. Everything looks healthy and well kept. They won't take this fish.
I think my best bet is to continue with staus quo and hope for the best, in the meantime getting the QT cycled and working to get the 90g going so my tangs can spread their fins a little easier.