You’re standing at the brine tank with a 40-pound bag on your shoulder and no idea how much of it belongs in there. The same question comes up in the store aisle, and it’s harder still with a water softener that came with the house and no instructions.
Here’s how much salt to put in a water softener, how many bags that takes, and how to add it without making a mess.
Quick Answer: How Much Salt Should Be in a Water Softener?
Keep your brine tank at least a quarter full at all times. Most households do best between half and two-thirds full. Always keep the salt above the water level. Leave a few inches of space below the rim too, because a tank packed to the top can form a hard crust that keeps the salt from dissolving.
How Many Bags of Salt Does It Take?
Tank sizes vary, so go by how full the tank looks rather than a bag count. For a rough guide, many household brine tanks hold around 200 pounds of salt when full. Half to two-thirds of that is about 100 to 130 pounds, which works out to roughly three 40-pound bags. Softener salt usually comes in 40-pound bags, but weights vary by brand, so check the label before you do the math.
Refills take less. Say your 200-pound tank is down to a quarter full, about 50 pounds. Filling it to two-thirds takes roughly 80 more pounds, which is a little over two bags. Refills usually land at one or two bags, and a bigger tank or an emptier one can take three. A brand-new softener starts empty, so a first fill takes the most. Look inside before you buy, since the installer may have already added the first load.
Not sure how big your tank is? Check the model tag on the unit or the owner’s manual. If you can’t find either, add one bag at a time, check the level after each, and stop when the tank is half to two-thirds full.
Three bags adds up to about 120 pounds to carry, and the tank is rarely at the top of the stairs. If that sounds like a chore, Mid-Mo Water Solutions’ salt delivery service brings the salt and fills the tank for you.
How Much Salt Does a Water Softener Use?
A typical household goes through about 40 to 50 pounds a month, which is roughly one bag. A bigger family, harder water, or a well pushes that number up, since more water and more hardness mean more salt per cycle. At that pace, a 200-pound tank filled to two-thirds takes about two months to drop to the quarter mark.
Your own household sets the real number, and our post on how often to add salt to your water softener shows how to check yours.
How to Add Salt to a Water Softener
Salt goes in the brine tank, the wide tank or compartment with the lid. The tall, narrow tank holds the resin, and nothing goes in there.
- Open the lid and check the level. Look at how much salt is left and where the water sits.
- Break up any crust. If the top layer looks solid or sounds hollow when you tap it, crack it with a broom handle before adding more.
- Pour in the salt one bag at a time. Keep the bags dry until you use them, and lift them to the rim instead of dropping them in.
- Stop when the tank is half to two-thirds full. Leave a few inches of space below the rim.
- Wipe up any spilled salt and close the lid.
Seeing a few inches of water at the bottom of the tank is normal. It usually stays under about 12 inches, and the salt just needs to sit above it.
Resist the urge to squeeze in that extra half bag. It won’t make the water any softer, and it makes the next check harder.
What to Do After Adding Salt
Nothing else, in most cases. Your softener regenerates on its own schedule and uses the new salt at its next cycle. If your water softener runs out of salt and the water turns hard, you can start a manual regeneration so soft water comes back sooner. The steps depend on your unit, so check the owner’s manual.
Lake of the Ozarks homes that sit empty for weeks need one extra check. Salt doesn’t go bad, but humid air can crust it over, so look in the tank when you open the place for the season and break up any hard layer.
Frequently Asked Questions
Can you put too much salt in a water softener?
A tank filled to the brim won’t hurt the unit on its own, but it makes problems harder to spot. Packed salt can form a hard crust called a salt bridge, which keeps the salt from dissolving. Stay under two-thirds full and you avoid it.
How many bags of salt does a first fill take?
For a typical 200-pound tank, about three 40-pound bags gets you to the half-to-two-thirds mark. Add them one at a time and check the level as you go.
How do I tell how full the tank is?
Open the lid and compare the salt to the height of the tank. Halfway is about the middle. If the top layer is crusted, push a broom handle down through it to find the real level, and break up any hollow spots as you go.
Can I add salt before the tank is nearly empty?
Yes. Topping off early is fine, and salt keeps. Just stay under the two-thirds mark so the tank doesn’t get packed.
Does well water change how much salt I need?
The fill level stays the same. Hard well water has more hardness to remove, so you go through salt faster and refill more often.
Want Us to Bring the Salt and Fill the Tank?
Mid-Mo Water Solutions delivers softener salt and fills the tank for homes in Jefferson City, Columbia, Lake of the Ozarks, and the surrounding mid-Missouri communities, in the right amount for your unit. Contact Mid-Mo Water Solutions to set up salt delivery.