This is a scam. DO NOT do their autoship!! You can't get ahold of them to cancel it. I have been on hold for over an hour and they keep sending it to me. I cancelled it and they still charge me. I have tried 3 times over the past month and sit on hold every time and eventually hang up. Do not even get started on this. It's not worth it.

Even though I don't add Rid-X with the recomended frequency (can't get the product here in Venezuela and I only travel to the US once in a while when I bring back several boxes), in 42 years I have NEVER have had trouble with my septic system. This product really does its job.

Total piece of junk! Don't throw your money away on this. Turn it down to mitigate the screeching noise and you don't hear any better than normal. Turn it up just slightly and it screeches and sounds hollow and fake. Most worthless piece of junk I've wasted my money on in a long time!