Sodium Hypochlorite Concentration And Place Of Purchase?

by Katie

I am wondering where you are able to purchase sodium hypochlorite, because I have called a few pool companies but none of them have any.

Also, what is the concentration of the sodium hypochlorite that you use for cleaning your pools?

Thank you!

Thanks for the question Katie

Most pool stores should carry liquid chlorine. Some of the larger retailers are Pinch A Penny, In The Swim (online) and Leslie's Pool Supply. You can go online to find your nearest retailer or a place the may deliver to you. If you live in a place that has softer water, below 50ppm, you can get away with using calcium hypo but I've always used and recommended liquid over granular.

Sodium hypo comes in a variety of concentrations but normally is between 10.5% - 12%. Regular grocery store bleach is about 8.5%. For every 1 gallon of pool chlorine you'd use 1.5 gallons of bleach.

Many people have used bleach for years to chlorinate their pools. I recommend pool chlorine for a number of reasons. First, it's less expensive than bleach. Then you have a slightly higher concentration of sodium hypo. Last, many pool stores reuse the chlorine jugs. Take them back and swap them out for filled jugs. This way there's much less waste.

If you feel your situation is more complex than this, I do phone consultations for a donation of your choice. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias.

Pool Consultation

Hope this helps and have a great Summer.


Click here to post comments

Return to Pool Chlorine.

What Exactly Are The Chlorine Types In Regular Terms?

by Pam

I know that sodium hypo is bleach, just not certain of the other three?

My husband has always taken care of the pool but he is disabled and has dementia and doesn't remember how to explain it to me.

Thanks for the question Pam

Yes, sodium hypochlorite is bleach. It depends on the strength of the product.

Bleach is about 6% sodium hypo with some salt, water, and inert ingredients. Pool chlorine is about 16%.

Next is calcium hypochlorite. This is granular chlorine. It has calcium as the binder and has a high pH level, about 12. If you have a problem with high pH, over 7.8, then use liquid.

Lithium hypo is a bubbling chlorine gas that passes through a solution of lithium, sodium and potassium sulphates. It's a free-flowing powder that provides 35 percent available chlorine and is the most expensive.

Sodium Dichlor is a stablized form of chlorine and can be used to add both chlorine and cyanuric acid (CYA) to the pool when the CYA is low. This can cause a build-up of cyanuric acid in the pool water.

Be careful when using Dichlor as it can get out of hand quickly.

For every 10ppm of chlorine added with Dichlor, you'll raise the CYA by 9ppm.

For every 10ppm of chlorine added with Trichlor tabs you'll raise the CYA by 6ppm.

Then you have Trichlor tabs. Trichlor is available in tablets and sticks.

It has a long shelf life and dissolves slowly. It's great for tab floaters or tab feeders. It works great for chlorination through the week but not for shocking or super-chlorination.

If you have soft water and low pH fill water, you can use granules. If you have medium - high hard water, use liquid for regular chlorination.

Use a tab floater for the chlorine tabs, never put them in the skimmer.

Swimming Pool Chlorine

Pool Shock

Pool Chlorine

Chlorine Tablets

Pool Chlorine Tablets

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Chlorine" category.

Check back to this post for updates or answers.

If you need immediate assistance (within 24 hrs) or for emergency personal assistance, you can make a donation of your choice and I'll answer your questions by phone.

Contact Me


Hope this helps and have a great Summer.


Click here to post comments

Return to Pool Chlorine.

What's The Best Way To Add Calcium Hypochlorite..Swimming Pool Chlorine

by Ed

I have an above ground vinyl pool and recently bought 40 lbs of calcium hypochlorite powder.

What is the best way of getting it in the pool?

I was told that the white solid in the bottom of the liner that I get is going to produce little holes in the liner.

Do I need to dissolve the powder in a pail first and then pour in the top layer of liquid into the pool?

Please suggest a good way of using the powder Ca(OCl)2


Thanks for your question Ed

You've made a good choice in using calcium hypochlorite. I've been using it for years with much success.

One word of caution: be sure to check the hardness of your fill water.

If your fill water hardness is around 150ppm - 200ppm, I would recommend liquid chlorine (sodium hypochlorite) as the cal. hypo. might increase the hardness of the pool water.

If you have soft fill water, then use the cal. hypo.

Use a Taylor Reagent FAS-DPD K-2006 pool water test kit. They're the best on the market.

Water Testing Kit

The white particles you will find on the bottom of the pool after using granular chlorine is the calcium.

This binds the chlorine together.

For vinyl pools, I suggest getting a bucket (maybe 5 gallons) 1/2 full with pool water, then add the granular chlorine.

Always add the chemical to the water, never the other way around. You can get a 3 - 4 foot piece of PVC pipe from Lowe's or Home Depot to use as a stir stick.

Mix the chlorine with the pool water and walk it around the perimeter of the pool with the filtration "ON".

Try to make any pool chemical corrections at night and allow to circulate.

You may want to use old clothes because the chlorine will bleach anything it contacts.

You can also give your pool a good brushing after adding the pool chlorine as this will help with the mixing.

Test the pool chlorine level after 1 full turn-over of the water, about 10 - 12 hours, then make another adjustment if needed.

Hope this helps and have a great Summer


Click here to post comments

Return to Pool Chlorine.