This is a good thread for me as I have had an ongoing parasite problem that could not be eradicated by waterlife products. I was recommended api general cure.
It is hard to get hold of here as I believe we are quite strict on those meds here in the UK and you need a prescription.
I only bought one box that treats 100 gallons. My tank is 47 gallon so just enough for the recommended 2 dose in the back of the box.
Symptoms included flashing, staying at the surface, breathing heavily, stringy white poop, erratic swimming and opening mouth wide.
I fed once before treating as I haven't been feeding a great deal since the parasite arrived. I will lay off feeding now for a couple of days. Temp has not been altered. Next dose in 48 hours following a water change. I'll post results.