septic treatment - Looking for recommendation

Anyone have a good recommendation for a septic treatment solution. That or info on where I can find good info for making the best choice? A neighbor of mine had some extra bags of Septic Helper 2000 which I've used that for the past year or so. I thought I'd just buy more of that but it's pretty spendy. In fact the web site ( doesn't even list the price and wants to have one of their sales representatives contact me to provide me the best solution. If a sales person has to call me then its because nobody would buy it if they put the price on their web site.
Thanks for any information,
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