Finding Garbage in Royal Nature Salt

[BlueTang<3]

So when i first opened the pail the top of the salt was covered in hair, thought well thats nasty scooped it out and threw it in the garbage. I have since found about 4 peices of black garbage bags in my pail and getting fed up with it. What kind of crap am i using in my tank? Used reefers best for 1.5 years and never found garbage.