Why can you fill your sinuses with ocean water but not tap water in a netty pot

Question

Why can you fill your sinuses with ocean water but not tap water in a netty pot

In: 1

Answer 1

Because tap water contains bacteria and amoeba. Being so close to the brain with little to separate them, the amoeba can attack the brain tissue and eat it. Resulting in yet another Redditor.

Using saline Wasted eliminates this possibility as the water becomes ionic with the addition of salt and kills bacteria and amoeba.