I read the article in the Head Mistress Reference Library on Fresh water system recommissioning. The version I have (from 2002) is a bit confusing. It says something like:- mix a solution of 2oz bleach with 1 gallon (presumably US?) of water. Make one gallon of this solution for every 5 gallons of tank capacity. Pour the bleach solution in the tank.- Fill the tank with fresh water.- etc etc.The confusing part is that this yields a solution in the tank of 2oz of bleach per 5 gallons of water (4oz/10gallons). A little bit further down the document there is a claim that anything less than 8oz/10 gallons is not enough to sanitize.Did I read the instructions wrong? Would it be fair/correct to rephrase the instructions as:- add 1oz of bleach for every gallon of tank capacity. You may want to dilute the bleach before adding to a metallic tank.- Fill the tank with fresh water.- etc etc.I realize that this is 10oz/10gallon but I suspect that the extra will not hurt the boat and will kill more effectively.