We once bought a septic tank product from FBK Products. What a mistake - it was like feeding a stray cat - that now returns every hour and meows it head off. Calls come at all hours - every few hours or so. We have informed them we no longer have a septic tank and please stop calling. They then tried to sell laundry products. If you try calling the caller ID number - you get a recording that hangs up quickly. read full review »