You have to quarantine them if you want to keep them.
Wild caught fish carry many parasites.
My group of 20 Mosquisto Rasboras are left with only 8 now due to the gill flukes outbreaks.
Gill flukes take long time to die off as their eggs may remain dormant for a long time.
Use any big container that you can find with an airstone or sponge filter temporarily.
Don't keep too many but just sufficient for you to be able to take care of them.
Change water frequently.
If you want to take precautions, use Praziquantel immediately after bringing them home.
Probably a 3-4 weeks treatment might be sufficient.
So, monitor, observe and quarantine them for 3-4 weeks before putting them in your main tank.
Almost all wild caught fish carry parasites with them.
When I bought the wild caught Satanoperca Jurupari from South America, they also carried gill flukes with them.
But it wasn't difficult to treat wild caught fish with gill flukes unlike the farm bred fish.
The gill flukes strain that are carried by the farm bred fish are resistant to most medications.
But if you really can't maintain and keep them, then just forget about it.