First, forget the urge to fill that tank like you’re stocking a submarine for a long voyage. Most water softeners need salt, but they do not need to be completely full. In fact, keeping the salt level between a quarter and a half full is the sweet spot.
Why? Because if you overfill it, the salt can “bridge” — which is a fancy way of saying it forms a crusty, solid dome above the water. Your softener then thinks, “Great, no salt!”, and stops softening. You get hard water, and you also get a weird archaeological dig on your hands when you try to chip the salt bridge apart.
How to Know Exactly How Much to Pour
Here’s the honest, no-nonsense answer: Check your owner’s manual. I know, I know — it’s like telling someone to read the terms and conditions. But every machine is a little different. Some are thirsty beasts, some are dainty sippers.
If you lost the manual (or your dog ate it, which is a very real possibility), here’s a safe bet: pour salt until it’s about six inches below the top of the tank. If your tank is short, aim for halfway. If it’s tall, aim for two-thirds. Never fill it to the very top rim — that’s a rookie move that ends in salt dust everywhere and a sad, salty dog who has just discovered the floor is now crunchy.
