I got a bottle of the prime and it stinks really bad i’ve only used about half of it is it still good
You’re good. Prime always has a sulfur smell to it.
Yes, I think Seachem uses a different dechlor chem system. sulfur smell is normal. prime is the solution. i use a small jar of SAFE, which is the dry powder form of PRIME solution. i use it a lot to dechlor my PURIGEN pouches after i bleach them clean to regenerate them. it smells too.