There are a few different ones that treat for different types.
I like PraziPro. This is the schedule I do on a minimum of 2 weeks...
Day 1. 50% water change, water conditioner (I use Prime) and dose Prazi 1 cap ful per 50 U.S gallons
Day 2 Prazi per tank volume again
Day 3 Prazi per Tank volume
Day 4 nothing
Day 5 Prazi per Tank volume
Day 6 large feeding
Day 7 50% water change, Prime per tank volume and PraziPro per tank volume
Day 8 starts at "Day 2"
etc...
I do not feed my fish, only the day before a water change. If newly picked up fish, I would feed them for a few days then begin the PraziPro.
Prize Fish, I do minimun 3-4 weeks, over kill but thats me
