What should I be looking for when buying chlorine tablets?

At the very least, paying attention to the available chlorine should be key when comparing or shopping for chlorine tablets abroad. It's best to also keep in mind that your local and trusted pool professional has done a lot of the legwork on the other, less visible benefits of one brand versus another -- such as compression, dissolution rate, potential impurities or ingredients that could cause unexpected staining or discoloration, etc.