I found a 2 quart bottle of ammonia at the hardware store that is unscented so I want to make sure this is the right type. It is Red Max brand Clear Ammonia, and for the ingredients it lists: ammonium hydroxide, and surfactant. Contains no phosphorus. Is this the right kind to use? I have been looking around whenever I go to the store and it seems like they are all lemon or some other kind of scented, so I hope this is the right kind!