Ah, OK. It is a pretty harsh chemcial that you may not find locally. I mostly wanted to make sure you were not going to add it to a reef tank. Some folks have recommended this in the past, but it is not a good idea, IMO.
If you cant find any I'll dig some up for you and send it postal for you. It will last a long time. As Randy said it is some harsh stuff, but if used right its great, and try not to spill it on anything
Steve, I have not ever used it to dip corals in. Have only used it in freshwater aquaria and "water gardens" to oxidize organics, and then to dip some fish (mainly koi) as well.