corals can also carry in fish diseases and coral dips do not kill them. Sorry, not to be alarming but
It sucks because my lfs which is 30 minutes away is closed Monday/Tuesday and being so new I don’t have everything needed to treat it/fix things immediately. I’ve been slowly acquiring it. So my Petco yes I know people hate it mine is good and has a big frag tank which is usually really good…has really helped me/the fish people used to work for my lfs and this is the first time I’m having any issues. Now I’m going to contact the store/corporate.
To be honest it not is not really petcos fault or even a LFS. The fish come from the ocean and they get mixed together in close quarters with other fish at the wholesaler... the wholesalter does not care about disease, they just care about shipping the fish out asap to places like Petco or a LFS so they can get their money. The fish catch disease from each other since they are kept in tanks together in large numbers... it spreads.
The fish are ofc stressed after being caught in the wild, shipped half way around the world, put into crowded tanks, shipped again to the LFS... then caught and brought home to you. Often not eating as they should during this process.
All this stress makes disease show its ugly head as their immune system drops. Not every fish will get sick just like not every person will catch a cold.
It is kind of part of the hobby that we have to learn how to combat. Some people set up separate QT tanks as there are not many effective reef safe treatments.
Now no place should sell you a fish they know is sick. Sometimes they just don't look sick until a few days later though.
Now worth noting is Petco is not allowed to use Copper in their tanks to treat fish. Probably because it is toxic and they don't want to be liable for employees doing something dumb. Many LFS DO use copper but not enough to cure a fish... but just enough to make the fish appear healthy until it goes in your tank where there is no copper.
There are obviously exceptions to the rule and some LFS even do a real quarantine. Some may know how to order from better wholesalers that have less disease and so on.