Yes, both are ray safe when used correctly, each treats a different parasite.
The Garlic thing is largely myth imo.......
Jack Wattley has said to me several times that ' you know when you are usin enough garlic when your house always smells like an Italian bistro" and " use only the juice extract from frsh garlic"
but from chats with researchers I have spoken with about this, for the active anti-helminitic ingrediant to be effective you would have to put so much garlic ( extract) in your tank there would be no room for water. It will to an extent clear some parasites, which can help keep a healthy fish healthy, but it will not clear all of them , mostly it acts as a (nematode) suppressant for already healthy fish.
