The guide to fishless cycling says that if the ingredient list contains surfactants you don't want it, but if there's no ingredient list you can shake the bottle and if no foamy bubbles appear then its ok. I found ammonia that lists ammonium hydroxide and a surfactent as the ingredients, but when I shake it no foamy bubbles appear. I've checked every drug store in the area and can't find anything better and I'm kind of running out of options. Would this ammonia possibly be okay? Its the Wal-mart great value clear ammonia, if that helps.