I'm wanting to do a fishless cycle in my 55 gallon, but I'm not sure if the ammonia I bought at Dollar Tree is OK to use. I looked everywhere, but everything else I could find listed surficants in the ingredients. The one I got today is "LA's Totally Awesome Clear Ammonia", and it has no ingredients listed at all -- no percentage or anything. I shook it up before I bought it, to see if it sudsed up, and it didn't make a single bubble, so I figured it didn't have surficants added. However, when I got it home, I was cleaning something with it and it felt slippery or slick, so I started thinking that it may contain surficants after all. Has anyone else used this ammonia for a fishless cycle, or can someone confirm that straight ammonia normally feels slippery? Or does someone know where to buy straight, unadulterated ammonia?