Just a quick question: From your signature, I see you have a sand filter, but I noticed that you mentioned adding DE after backwashing. Are you adding the DE to help the filtering or have you a DE filter instead of a sand one? I only ask, because sometimes the helpful folks will make adjustments based on the type of filter.
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BTW: Have you noticed the blue color starting to show in the recent pictures. I sure have!!
Sometimes it can seem like a never ending job. Hopefully it will clear up sooner. How often are you having to backwash ??