Crazy for a Cleaning Product

I'm a gal who can get a little crazy for a new discovered cleaning product. The last one I was really excited about was the product line by Method, but this weekend I found a new FABULOUS addition to my cleaning arsenal.
I should first explain that we are "County Folk." We don't live in the city and so we have our own well. As many county folk can tell you when you have your own well there are a number of staining issues you may end up dealing with.
Before we moved in our house the water was on, but the filtration was not set up yet and we ended up with dark nasty stains in our sinks and a ring in our toilets. I've tried a number of heavy duty products but hate using the chemicals. I would say I lean a little toward the "green" side when it comes to chemicals. I have precious little ones and who knows what these chemicals will do to their little bodies in the long run. In addition we're on a septic system and I don't want to send something out there that will kill the good little bugs that are doing their hard work decomposing our waste.
Consequently, being the cleany that I usually am, it's a little embarrassing when we have company over. I don't want them to think lack of flushing or cleaning has caused these terrible stains.
So, this weekend while wandering the cleaning product aisles at Wal Mart I picked up a little Bathroomstone by Earthstone. I almost didn't buy it because it was a whole $3, but it piqued my interest. It is made for "heavy duty cleaning and scrubbing." It has no harmful chemicals and is completely safe. The packaging reads, "It easily cleans even the toughest hard water, soap scum, and mildew on porcelain or tile and grout."
I brought the little stone home and took it to our guest bath. I gently applied the stone in a gentle circular motion as instructed and in stains quickly disappeared!! I couldn't believe it. For four years I've battled these awful menaces and in just seconds they were gone!
So, here's my endorsement for the Bathroomstone by Earthstone. I think I'll check out their website and see what other goodies I might find www.earthstonetechnology.com
Happy Cleaning!