Is it really necessary to use medication for Ich at all?
At temperatures of 84 degrees, I thought Ich's reproduction cycle would halt?
I think you can imply keep the temperature at that level for another week or two to let the rest of the Ich die off...
I think the conventional wisdom is above 86 and that there have been strains that have proven to live into the mid 90's. The other big assumption is that your fish will live that long. In FW, I prefer 85-ish with meds in a QT. Tank fallow for 4 weeks.
BTW: Also a good time to go dark and whack out any algae that may be hanging around.
The reason I didn't want to raise the temp. to 86 is because my Boesemani Rainbows sit up top even when I raise it to 84.
The fish are doing MUCH better today. I hardly see any flashing/scratching. The loaches are very active again. I have my temp. at 80 and will continue to treat with aquari-sol for a few more days.