My pool was installed ~3 yrs ago with a cheap no brand EC20 SWG . https://storage.ua.prom.st/1622310_instruktsiya_bridge_ec_eng.pdf
Generally it has worked ok, but it’s getting flaky at times. It’s supposedly 20g/h (1.06 lb/day), but at 4/5 power it just keeps up with our 12,000 gallon pool...