I use some heavy duty stuff I got in Taiwan, the same thing used by many farms, for bad outbreaks. That stuff kills all the BB too! For regular and preventative use, prazipro should be ok. It's mild enough for most fish including rays. I usually do cycle of 5 day treatment 3 times. I am in no way an expert on that, so quick google will get you plenty of info online.This is definitely not a problem I always keep a QT tank set up. Having discus it's a must. It's good to know about the de-wormer. I never thought about that being that they are wild as I usually keep captive bred discus. Would you have a specific de-wormer that you suggest? I did get it from a reputable seller but again always better to be safe than sorry.
Thanks for the advice I will make sure to put it into practice starting tomorrow.