Why in the world does saltwater in my tank bother me? My skin gets so itchy and irritated! But if I go in the ocean it doesn't.. So it's not really a saltwater fish tank question but every time I clean my fish tank I figure someone out to know..
Do you have the same itchiness if you put your arm in fresh mixed water prior to adding it to the tank?
It may be what you are keeping in your tank, and not the saltwater.