So why do have to use more copper today to kill Ich than you had to use 30 years ago?

[old salt reefer]

So why do you have to use more copper these days to kill Ich than was used to kill it 30 years ago? And for that matter Velvet too?

 

[theMeat]

Getting more resistant to all types of treatments.

 

[old salt reefer]

Why is it getting more resistant? How is it getting more resistant?
The ich and velvet in the ocean isn't being treated in the ocean with copper to kill it so ich and velvet coming in with a fish from the ocean isn't more resistant to copper.
Where is this resistant ich and velvet coming from?

 

[Tamberav]

Why is it getting more resistant? How is it getting more resistant?
The ich and velvet in the ocean isn't being treated in the ocean with copper to kill it so ich and velvet coming in with a fish from the ocean isn't more resistant to copper.
Where is this resistant ich and velvet coming from?

Wholesalers tanks? LFS? Whatever place uses lower level copper to suppress pathogens.

 

[old salt reefer]

But lower level isn't suppressing it, it's helping the ich and velvet to get resistant. At what point does the level of copper kill the fish but not the pathogens? The fish aren't getting more tolerant of copper in the ocean. Is putting a fish in copper for a disease that it may or may not have a good thing then? Shouldn't we wait and see if it has ich or velvet and then treat for it? I mean look what's happened with people and antibiotics. Just giving antibiotics to people(as well as cows,chickens,etc) for a disease that they may or may not of had as well as the people feeling better and stopping taking the antibiotics(low level) has led to resistant bacteria that can't be treated. People are dying from resistant strains of bacteria are our fish(and hobby) facing the same fate in a few decades?