which salt mix with bio pellets

[Amadod2]

So im thinking of running bio pellets, as i am going to increase my bio load with the amount of fish i am going to be adding in the future. my question to you all is which salt mix do you use when you are running bio pellets? I was told from a very knowledgeable person that you shouldn't be running more then 8dkh if you are using bio pellets.