I know this is a bit old to be replying. However I was trying to find ammonia to do a fishless cycle. Anyway I emailed countdown and spoke with them on the phone and they contacted the homebrand people who make "Cloudy Ammonia" and actually the only ingredients in it is ammonia and water. I made them confirm it because I really really wanted to know!! There are no soaps or detergents. If you want a copy of the email proving it from their customer support I can send you one. So feel free to use homebrand cloudy ammonia to fishless cycle your tank!!
Now I realise that so called "cloudy ammonia" does have soap or detergent in it (just like wikipedia says), however homebrand don't put it in theirs thankfully.
