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Hi All, I am planning on having my pool completely drained and acid washed. The pool is about 6 years old, it has some light white staining on the bottom and some surface calcium scaling - hardness 700 , high CYA and high TDS. I'll have a local neighborhood pro doing this for me, but still...

Hi Everybody, Please help me as I am not sure which SWC works better on my current setup. I am located in Phoenix, Arizona and have a lap pool 75x25 in-ground, about 46k gallons, Pentair DE filter, broken 6 years old Zodiac/ClearWater SWC LM-40. I run my Intelliflow VS pump from 12 to 7 hours...