Alkalinity Multiplier
Alkalinity Multiplier
Alkalinity Multiplier
Alkalinity Multiplier
Alkalinity Multiplier
Alkalinity Multiplier

Alkalinity Multiplier

Quickly and easily raise your pool’s alkalinity.

👍 60-day money back guarantee 🚚 Free shipping on all orders 📦 Orders Arrive in 2-5 Days

  • Raises your pool’s alkalinity to appropriate levels (100-150 ppm)
  • Helps buffer pH levels providing a host of benefits for your pool
  • Enhances chlorine effectiveness
  • Reduced need for other chemicals
  • 100% Sodium Bicarbonate
  • Test your pool with a test strip or another method to determine your pool’s alkalinity level
  • If result is less than 100 ppm, add product according to dosage chart on back of bag
  • Run filter and test again in another 2 hours
  • Watch video tutorial here

Overall rating: 4.714286 / 5 from 14 reviews.

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Reviews

Works Fine In My Jacuzzi Spa

"I have used other Pool Day products in my Jacuzzi spa and I consider them to be a good product at a fair price. I’ve had pools and hot tubs for over 30 years and I know how important it is to keep the water properly balanced. I find the 250 gallon hot tub is harder to keep balanced than a 30,000 gallon pool. I have a chemical routine that I follow closely, it doesn’t take a lot to maintain water chemistry but you can’t do it if you don’t have the right products on hand. This five pound bag is a great value for the price and will easily last me a couple of years."

— DanDan (5/5)

Fast Dissolving

"We are out of our usual brand of baking soda, so I tried this. Price is of course higher than the bag we get from the warehouse store, but it seems it dissolves faster. Thanks for reading, and YMMV."

— SimonSimon (4/5)

It just works.

"At this price point in a pool heavy area like we live in, this is a good value. It works, so no worries there. As with other Pool Day products it comes in a nice zipper package that can be resealed if necessary. Again, keeping your pool balanced is important and this is another good product to keep in your pool chemical arsenal."

— Lou M. (5/5)

Haven’t received it yet!

"Haven’t received it yet!"

— Kevin H. (5/5)

Easy to follow instructions, worked great in my pool

"This works great. It comes in a nice, thick bag that is sealing on the top, so you can store it after opening. It has clear, concise directions on the back and even explains how to calculate the amount based on the number of gallons of water are in your pool. My alkalinity was about 20 PPM too low, so I followed the instructions, dispersed this in my pool and retested about 3 hours later, and the alkalinity was back within the desired range, so I know this stuff works!"

— Matt (5/5)

Raised alkalinity.

"My alkalinity was low and needed to be raised quickly. I used this product and tested the results with a digital photometer. The results were great, the product did what it was intended to. Not sure if it's just baking soda, however, it worked great. There were no clumps, just a fine powder that mixed easily with the pump running. There are instructions on the back of the product, and they're easy to read. Satisfied with this product and would highly recommend it."

— tybran (5/5)

Pool and Spa Alkalinity

"I think this worked to even out our pool. We have an oxygen pool and have been experimenting with different types of things to keep all the levels where they should be."

— Pat (4/5)

Alkalinity Multiplier is very Helpful in my spa

"I have had a hard time keeping my spa Healthy looking.I added Pool Day's Alkalinity Multiplier to my spa. The power dissolved quickly.I checked the spa water a few hours later and the total Alkalinity was closer in the ideal range.This is a 5 LB bag.I would Recommend Buying this Product"

— Jean T. (5/5)

Inexpensive alkalinity plus

"Those who have hot tubs know the chemicals can get expensive. This is a great inexpensive alternative. I personally transfer it to old containers and seal the extra and put away in storage. This is a fraction of the price of what I was using and it allows me to maintain the water balance the same as what I previously used."

— Bruce (4/5)

must have for hot tubs

"good bang for your buck. works just was good as other brands to increase the alkalinity of the water. bag does take up more room in my small cabinet but you get more for your money so its totally worth it. would repurchase this brand when we run out"

— Amanda M. (5/5)

Q&A

Make your pool Squeaky Clean

Easy to use
Slick application methods make your DIY job a little easier
Clear video instructions
All our products have a QR code with short, easy to follow video instructions
Premium products
Simply put we source only the best, don't wonder about what's going in your pool or hot tub
Save money
Customers using our products for DIY maintenance save 60% on average vs. hiring a technician
Let us help you, help your water 🤝
You don't need a service tech 🙅
Let us help you, help your water 🤝
You don't need a service tech 🙅
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Frequently Asked
Questions

Simply put, we stand by our products! If you’re not happy with the results just reach out at returns@poolday.com within 60 days of your purchase and we will help you process a return. You will receive a 100% refund, minus the cost of shipping the order back to us. (Please note only your most recent order is eligible for a return).

All orders at Pool Day ship free across the entire United States😎


That’s right, even you rare-breed Alaskan pool owners get our products shipped to their door for free. We are very jealous of your endless summer nights, but not so jealous of your 2-month pool season.

Right now, we only ship across the US. We are hoping to expand to additional countries soon!

We are changing the pool care game.


Traditional pool chemical brands sell products with technical sounding names and instructions that are about as easy to interpret as hieroglyphics. You go to your pool store, wait in line to have your water tested, and the next thing you know you’re out a sizeable piece of your paycheck having been sold a whole assortment of products you’re not even sure you need.


Does it have to be that hard? The pool care industry doesn’t want you to know this, but the resounding answer is NO.


We are building a brand that makes it so much easier for the average pool owner to care for their own pool. With easy to understand instructions, top notch customer service and a suite of innovative products, Pool Day is making a splash. Thanks for letting us help you help your pool!