Here is information about my set up and TTM process. It's probably more than you wanted, but maybe something will ring a bell...
-Regular QT (before TTM) is a 10 gallon tank with about 8 gallons of water in it. HOB filter with a small handful of live rock rubble inside, along with a carbon filter or just filter floss if treating with meds. Inside the tank is a 50w heater, an airstone, some PVC pieces and a small terra cotta flowerpot added for the clowns. This setup was cleaned and sat out to dry for about a month before it was set up for the clowns.
-I usually top off with water from my display, which I believe to be disease-free. I currently have two fish in the display: one seaweed blenny, which came as a hitchhiker with my live sand from the Gulf of Mexico about 14 months ago, and a pajama cardinal, which came from my lfs about 7 months ago. The only other fish I had in the display was a firefish, which jumped to his death last summer. None of these fish have ever showed any signs of ick.
-What we believe is ick was first spotted on 6/16 or 6/17 (after they had been in QT for 4 weeks), but the clowns remained in the original QT tank through 6/20. My guess is that a milder case of ick probably surfaced earlier and I missed it. Then I noticed the the second wave that was much more severe.
-Once we decided it was ick, I purchased a 5.5 gallon tank along with a new heater, airstones, airline tubing, thermometer, turkey baster (for sucking out waste and leftover food), new container for dipping out water. I've also tried to not even double-dip the pipet for the refractometer when checking salinity.
-For TTM, I have removed the HOB filter and its contents, and the flowerpot.
Day 1, 6/19: around midnight (maybe even shortly after, making it 6/20) I transferred the fish from the original QT (let's call it QT-A) to QT-B. The following morning, I cleaned QT-A with tap water and sat it out to dry. Items that were not drying as quickly were placed on the floor in front of the air vent (it's hot here, so it runs almost constantly). Everything was dry for 24 hours before setting up for the next transfer.
-To set up QT-B, I used mostly water from my display. But the fish were showing signs of distress and breathing heavily the next morning (assuming the ick was in their gills), so I followed the advice of ThRoewer and set up a freshwater drip to lower SG to 1.018. I have kept them at this salinity since this time. Also, the temp has remained constant at 78.
Day 4, 6/22: around 10pm, I transferred the fish from QT-B back to QT-A. This time I did not use any saltwater from my display since I needed SG 1.018. Used fresh saltwater (at least 24hrs old). Also, when I cleaned QT-B the following morning, I used a little bleach as a precaution since I expected some parasites to fall off.
Day 7, 6/25: around 7pm, I transferred the fish from QT-A back to QT-B. Again, used fresh saltwater (at least 24hrs old). Also used bleach again to clean QT-A.
That's it so far. The only item that I used on both tanks was up until the most recent transfer I did share the top because I didn't have the material to make another (plastic canvas from the hobby store). I did rinse it well in between. Also, when I set up QT-B this most recent time. I did stick the turkey baster from QT-A into the tank before I realized it was the wrong one
But once I realized it I put it in the items to be washed and grabbed the correct baster.
I'm about to post a couple photos from this morning... I think they have fewer parasites...
