div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails1jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails3jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails4jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=5Page 5button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=5 data-page=5 class=ts-thumb lazyload alt=Page 5: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails5jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=6Page 6button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=6 data-page=6 class=ts-thumb lazyload alt=Page 6: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails6jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=7Page 7button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=7 data-page=7 class=ts-thumb lazyload alt=Page 7: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails7jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=8Page 8button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=8 data-page=8 class=ts-thumb lazyload alt=Page 8: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails8jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=9Page 9button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=9 data-page=9 class=ts-thumb lazyload alt=Page 9: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails9jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=10Page 10button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=10 data-page=10 class=ts-thumb lazyload alt=Page 10: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails10jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=11Page 11button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=11 data-page=11 class=ts-thumb lazyload alt=Page 11: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails11jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=12Page 12button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=12 data-page=12 class=ts-thumb lazyload alt=Page 12: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails12jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=13Page 13button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=13 data-page=13 class=ts-thumb lazyload alt=Page 13: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails13jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=14Page 14button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=14 data-page=14 class=ts-thumb lazyload alt=Page 14: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails14jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=15Page 15button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=15 data-page=15 class=ts-thumb lazyload alt=Page 15: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails15jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=16Page 16button div class=ts-imageimg data-url=nspi-newsletter-swimming-pool-filter-the-filter-is-designed-to-use-silica-sandhtmlpage=16 data-page=16 class=ts-thumb lazyload alt=Page 16: NSPI Newsletter - Swimming Pool Consultant · filter The filter is designed to use silica sand which has an effective particle size of 45 mm and a uniformity coefficient of 15 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader035vdocumentinreader035viewer20220710235fd74c73f1db046497414fb4html5thumbnails16jpg width=140 height=200 divdiv