I have been using freshwater conditioning salt i bought at my lfs for quite awhile now, but its beginning to get a bit expensive. I was wondering if it is safe to use kosher tablesalt, or if there are any cheaper ways, let me know.
i always use salt after a water change. get the salt used for home water softeners. its a blue bag with salt crystals just like the API stuff. i get a 40lb bag at lowes for about $5. you can find these almost anywhere