I buy in bulk from NFP.
They don't have small amounts for sale but have good medications.
https://store.nationalfishpharm.com/...h/category:298
Thomas Labs are also useful ;
https://fishmoxfishflex.com/
I have used Hikari Prazi.
I get my Levamisole from Charles Harrison /inkmaker or at tractor supply sold as prohibit drench
Metro can be tricky and a waste if you buy the wrong brand .