Hi all, been using this method for the second year and am doing great and saving a ton of money, what an awesome site this is and what a great method TFP method is.
So my question has nothing to do with the chemical levels but the amount of DE to replace when back-washing my DE filter. I have been told to use 6 lbs. of DE for the size of my DE filter. Since my pool is kept very clean, I only back-wash the filter once a season (when the pressure builds up) and replace it with 6 lbs of DE. I notice this time and the last time I did this that there was a lot of gray-ish power at the bottom of the pool. When I asked someone about this, he told me that the 6 lbs. is for when the filter is completely cleaned and there is no DE in it at all, but that when I back-wash it, no mater how good I do it, I really only need half (or 3 lbs.) of DE. Is that correct? That would explain that what I am seeing at the bottom of the pool after adding 6 lbs. of DE after just doing a back-wash is DE accumulation. FYI - When I close the pool, I take apart my DE filter and clean each filter until there is no DE at all left so adding 6 lbs. after doing that is not an issue.