Simple Regression (Trend line Analysis)

Cycle length is decided according to the head loss, water quality, and filtration rate. Typical cycle time is 1~6 month and it is shorter due to algae in summer. The expected period between scraping can be expected to be 4 to 8 weeks and the anticipated medium replacement will be when half of the bed has been removed, i.e. about every 2 – 3 y. 4. ................
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