Costco Chlorine Tablets, Clorox Pool & Spa Xtra Blue


Costco sells these Clorox Pool & Spa Chlorine Tablets for $87.99. Scroll down for photos. Summer isn’t quite here yet, but it’s a good time to start thinking about those summer days. Make sure to get your pool cleaned and ready to go for summertime! With quarantine affecting most people for the last year or so, I’m sure people are ready to get out. Hopefully bans will be lifted on gatherings & we can have a normal party again. This means you better have your pool cleaned and ready for use. These are your standard Clorox XTRABLUE 3″ chlorinating tablets, which are meant for your pool or spa. This is one of the better deals around, so get them while you can. Here are a few more details about these Costco chlorine tablets……

  • Clorox Pool & Spa XtraBlue 3 inch tablets (40 Pounds)
  • 6 in 1 Formula
  • Kills Bacteria
  • Softens Water
  • Controls Algae
  • Sunlight Resistant
  • Helps Prevent Corrosion

*Disclosure: I only recommend products I would use myself and all opinions expressed here are our own. This post may contain affiliate links that at no additional cost to you, I may earn a small commission. Read full privacy policy here. 

Costco Clorox Pool & Spa XtraBlue 3″ Chlorinating Tabs


This bucket comes with approximately 80 3 inch tablets. It’s the 40 pound value size. I think Costco used to sell a 50 pound bucket in the past, but now it’s 40 lbs. Costco doesn’t sell this online probably because of the shipping, so it’s best to get it in store. If you can’t find it in store or you want to check out some of the other highly rated 3 inch tablets, make sure to check out the following links. There are a few other brands besides Clorox & they are very HIGHLY RATED. Check out the links here…….

Price: $87.99, Item Number: 958894

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22 thoughts on “Costco Chlorine Tablets, Clorox Pool & Spa Xtra Blue

  1. Yes its true tabs have stabilizer, buts it’s so minuscule that if you regularly use your tablets you wont need to drain for at least 3-4 years which in my opinion is long enough to go with the same water regardless of the cya.

    1. Sorry Joanne. I am no expert when it comes to pool maintenance. Hopefully someone reading this can chime in with their experience.

    2. Hey Joanne, it’s smart to do around 1lb of shock per 10k gal of water once a week. You would also want to do abt 2-3 tabs once a week as well. As tabs just maintain the level while shock is what actually increases the level so that the tabs can keep it maintained.

      1. Thanks for the tips Elijah! Hopefully that is able to help out a few people who might be reading this. Appreciate it

  2. I recently tried to pickup chlorine tablets at my local Costco and learned the shortage is related to a fire at the plant that makes the tabs. True or not I don’t know.

    While hunting for a replacement a Google search turned up comments on a pool forum where the pros hang out. Seems the consensus is you don’t want to use to chlorine tabs (liquid chlorine is preferred) and you especially don’t want to use a ‘blue‘ pool product as that is code word for copper.

    Tabs have stabilizers that will raise your CYA (cyanuric acid) levels. This helps chlorine last but throws the chemical balance off in the pool such that it is often necessary to drain and refill the pool to remedy.

    Copper is a problematic heavy metal to add to pools. I personally don’t want copper in my pool. Do your own research from these pointers, but I’m getting off the Clorox Blue train now.

    1. Well thanks for the information Jean. I can’t verify that information, but it gives us something to research & maybe ask questions about. One could always ask their pool maintenance person when they swing by. I appreciate you sharing that information.

    2. The shortage is real. It was announced in the news.
      The manufacturer is located in Louisiana after a hurricane last year It suffered a fire. They’re hoping to resume Production next year 2022.
      With covid-19 production will be slow.

      1. Thanks for the heads up Jasmine. I haven’t seen it in stock at Costco since early summer. Good to know. You’re right about COVID slowing everything down.

    3. Yes its true tabs have stabilizer, buts it’s so minuscule that if you regularly use your tablets you wont need to drain for at least 3-4 years which in my opinion is long enough to go with the same water regardless of the cya.

  3. do you have the chlorox 3″ chlorine tablets for pools in stock at warehouse or do I need to order them on line item # 958894

    1. They are in stock in the local Costco’s near me. I live in Northern California. You may want to visit your local Costco first & check the item number to see if they have it, will have it, or have it nearby. It will save you on shipping. Let me know if you end up finding it

      1. I’m in Ohio and we cannot find the chlorine tablets so are you able to get them at all? There

        1. Yes, I have seen these in stock at all he Costco’s around me. Summer is upon us & these have been in and out of stock at my Costco’s. When they first hit the shelves they were gone within days, but now they seem to be in stock a little more often. I would grab the item number & see if you can ask a Costco employee when they will be in stock. Hope that helps

  4. Looking for a store near me to buy the clorox xtrablue chlorine tablets advertised above. My zip is 11934. Can’t find it via local web page.
    Thanks in advance!
    Gene

    1. Hi Gene. Costco doesn’t have an inventory tracker online. You would need to call your local Costco to see if they stock these Chlorine Tablets. It doesn’t look like there is a Costco on Long Island so I would call the few Costco’s near you and see if they stock them. Wouldn’t want to waste a trip if they’re not in stock. They should be able to help you. Hope that helps

        1. Awesome! Thanks for the heads up Emmanuel. It’s nice to helps out fellow Costco Fan’s. I can’t tell you how many times I’ve gone back to a specific Costco only to find a product gone! It’s amazing how much inventory they move. Thanks for stopping by

    2. My Costco in the NY area had a different brand a month or so ago, maybe HTH. Pretty sure they sold out of that and the shock very quickly due to chlorine shortages.
      Also, on a side note these Clorox brand chlorines have high amounts of stabilizers which can build up and cause problems which will require draininng/refilling water to dilute.

      1. I saw that HTH at the store also. I’m kicking myself for not snapping some pictures of it because it was right next to this Chlorine. Thanks for the tips on Chlorine usage. That’s good to know

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