We match temp... we have a long hose that we run from our bathroom sink to every tank in the house on water change day. We make sure there's hot water in the hot water heater so we can match temp, and just move it from tank to tank and fill. We use the pond Prime because it comes in a big bottle from Drs. Foster and Smith.
The only thing new in the tank is the driftwood and plants. The driftwood, instead of being dry on a shelf, was sitting in a big pond at the front of the store. I guess it could have had the parasite on it. Same for the plants. Right? I don't know LOL.
Definitely no other fish. Frank is a lone wolf.