Don’t forget—your water usage changes with the seasons. In summer, you water your lawn, fill up kiddie pools, and take extra showers from 80-degree sweat. You might need to regenerate every 4 days instead of 6. In winter, when everyone is hibernating, you can stretch it to a full week.
So here’s my final, ironic, friendly advice: stop guessing. Either buy a softener with a demand meter (thank me later), or calculate your personal grain consumption. If you’re too lazy for that, just watch your glassware. When it starts looking cloudy after a wash, that’s your signal.
Dave? He finally listened. He set his softener to regenerate every 5 days, and his lawn is now a masterpiece of mediocrity. But hey, at least he’s not wasting salt. And his water? It’s soft as a whisper. Now go check your own settings—and maybe give that brine tank a friendly tap.