Hey guys, Today I was going through a petco near me for new filters and I was just walking around to see what they have. They had herbtana which I used in the past for fw ich, but I read it and it claims that it can kill velvet. To say I was skeptical would be kind of an understatement. Has anyone tried this with success in marine aquariums as it is invert safe unlike copper, or do people use this more as preventative? This is something I'd want to test but none of my fish have velvet, so no testing for me, thankfully.