Below are a few of the most popular DE filter sizes along with the required DE amounts after back-washing. You will add roughly 80% of the DE powder compared to a full cleaning. Since you are not removing all of the DE powder When back-washing you do not remove all of the DE from the grids. Normally to clean your DE filter you perform a process called back-washing, this is a process where you use the backwash valve mounted on your filter to strip the dirty layer of DE off of your DE grids. Below are a few of the most popular DE filter sizes along with the required DE amounts. We suggest doing a full DE filter cleaning 1-2 times per year. If you are starting with a brand new DE filter installation or doing a full cleaning meaning you are removing all of the DE fromyour filter grids then you will add 1 lb of D.E. These two issues occur if you are way under or way over on your DE powder so if you are off by a scoop or so don’t sweat it. If you add too much DE then it is possible to have bridging, meaning that the DE powder builds up too much between the grids reducing flow and filtering capacity. It is important to try and add the proper amount of DE to your filter, if you add too little DE then dirt, oils and debris may get embedded into your grids ruining them. We decided to put this article together as a quick cheat sheet when it is time to replace your DE powder. “How much DE do I add to my filter?” is one of the common questions we get on a daily basis.
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