You’ll see two types: single-tank and twin-tank. Single-tank is the workhorse: it softens, then regenerates, then you wait. Twin-tank systems? They’re overachievers—one tank softens while the other takes a nap and regenerates. Continuous soft water, 24/7.
Unless you’re a royalty with a 10-bathroom mansion, a single-tank is probably enough. But if you hate waiting for anything (same), a twin-tank might be your soulmate.
How to Choose the Right Water Softener? (Fulfill Needs) - CharlieTrotters