The only thing I can add is that on another pool forum a conversion using chlorine alone in an indoor pool took a while and resulted in lots of persistant combined chlorine. Using sodium percarbonate resulted in a much faster conversion without the combined chlorine. However, these two methods are incompatible with each other as the percarbonate and chlorine react with each other (when both are at high concentrations) to effectively disable both. The percarbonate essentially produces hydrogen peroxide in water and does not last as long as chlorine, but is a more powerful oxidizer (which is what makes the conversion go faster). It also introduces sodium carbonate into the water which is essentially pH Up. Ben has mentioned avoiding these compounds (percarbonate, perborate, etc.) for regular use, but for a Baqua conversion it might be an alternative, especially if you find the conversion difficult using chlorine alone.

Richard