I use my grocery store brand, Giant Eagle's. Charmin is one of the worst for clogging septics. I get my septic pumped every two years and here it's the law that you can't go longer than 3 years w/out having your septic pumped. They keep a record and if you don't do it, you get notified. I already got my notice in the mail. I'm just waiting for warm, dry weather. I don't want that big truck driving on my lawn w/all this snow, rain and muck.