Am new to this forum. We would like to get step by step instructions on how to close our above ground pool switching to the new BBB method. We have been operating with pool store chemicals for over 6 years now with no problems other than cost. We have a 27' round pool with 66,000 litres. We are in central Ontario, Canada and close our pool on Labour Day and open late May. The pool is drained down and it will freeze solid over winter. We are still trying to find a reliable source for Borax, etc.