Has anyone here used walmart salt pellets to treat your tank? Not the rust remover type. Rays are fine, but my Aro has had redness on one side for a couple weeks. Anyway, thinking about adding some salt pellets for our water softner. I remember someone talking about doing this awhile back. Gonna put it in with my mechanical filteration so it can dissolve over time. Bag said 99.8% pure salt. Thanks.