I do see occasionally flashing amongst the corys and from the Redhead Tapajos. Thankfully, the R.T. are very willing to stay up at the glass so I can really look them over and I don't see any ich or other pests.
I have the prazi now and am considering dosing the entire fish room just as a precaution. I have 50 grams which is enough to do 4 doses if I dose the entire fish room. It's plant and shrimp safe. I know it is effective against skin and gill flukes but I need to read up on what other parasites it is effective against.