Maybe they changed from chlorine to chloramines as a disinfectant and that destroyed your membrane and other filters.
I'd try pulling the membrane and re-seat it if your tds in is the same as out. Maybe a gasket failed.
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Hobby Experience: 9200ish gallons, 26 skimmers, and a handful of Kent Scrapers.
Current Tank:
Vortech Powered 600G SPS Tank w/ 100gal frag tank & 100g Sump. RK2-RK10 Skimmer. ReefAngel. Radium 20k.
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