Aquarium Salt?

[grant]

I know that axolotls like hard water and people often put salt in the water to help. I was wondering if I put some of this stuff that my girlfriend sells (at a pet store) called Aquarium Salt would it be helpful to put some of it in his filter. Here is a link that shows it: http://www.petfooddirect.com/store/product_detail.asp?pf_id=80434345&dept_id=150&brand_id=175&Page=
But on the box it just says "reduces stress and adds electrolytes." Well would there be any negative effects from this do you think?

 

[joan]

That's the type of salt to add, it's also the type I use for salt baths. Aquarium salt, instant-ocean type salt work well too.

 

[grant]

Ok thanks a lot Joan. I had used it on the guppies a few days ago and they seem to be doing great. I just added some to my axies tank. Thanks a lot.