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STABILIZED vs UNSTABILIZED Chlorine: What's the Difference? | Swim University
Stabilized, unstabilized. Potato, potahto. It’s all the same stuff, right? Sure, until you can’t figure out why your pool is growing algae and smells like it’s full of bleach instead of water. Here’s the difference between stabilized and unstabilized chlorine.
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⏰ Timestamps:
00:00 – Introduction to Stabilized Vs. Unstabilized Chlorine
00:43 – Chlorine Sanitizer and Chlorine Levels
01:27 – What Is Unstabilized Chlorine
04:31 – What Is Stabilized Chlorine
05:53 – CYA or Cyanuric Acid Levels
06:38 – Which One Should You Use: Stabilized s. Unstabilized?
07:44 – Chlorine Levels
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Swim University®️ has made swimming pool and hot tub care easy for more than 10 million homeowners. And each year, we continue to help more people with water chemistry, cleaning, and troubleshooting. We know taking care of a swimming pool or spa can be difficult. And it’s hard to find a trusted source of information. We get it! This is the reason we created Swim University®️.
😎 Visit our website for more in-depth information on swimming pool maintenance:
difference between fresh and saltwater
Stabilized, unstabilized. Potato, potahto. It’s all the same stuff, right? Sure, until you can’t figure out why your pool is growing algae and smells like it’s full of bleach instead of water. Here’s the difference between stabilized and unstabilized chlorine.
💦 Get 10% off our pool maintenance video course and ebook by using the promo code VIDEO:
🏊♂️ Our Favorite Pool Maintenance Gear:
⏰ Timestamps:
00:00 – Introduction to Stabilized Vs. Unstabilized Chlorine
00:43 – Chlorine Sanitizer and Chlorine Levels
01:27 – What Is Unstabilized Chlorine
04:31 – What Is Stabilized Chlorine
05:53 – CYA or Cyanuric Acid Levels
06:38 – Which One Should You Use: Stabilized s. Unstabilized?
07:44 – Chlorine Levels
📺 Subscribe to our channel if you want more information on swimming pool and hot tub maintenance:
Swim University®️ has made swimming pool and hot tub care easy for more than 10 million homeowners. And each year, we continue to help more people with water chemistry, cleaning, and troubleshooting. We know taking care of a swimming pool or spa can be difficult. And it’s hard to find a trusted source of information. We get it! This is the reason we created Swim University®️.
😎 Visit our website for more in-depth information on swimming pool maintenance:
47 Comments
Which type of chlorine do you use in your pool?
8:48 pun intended? Lol jk
it don't really matter cause in the end they will both kill me when I swallow them
How do you get chlorine or rather how do you get allergy out of a pool
This was super useful. I changed my Salt Cell last year to my AutoPilot system(original last 10 years), and this year in particular it just doesn't maintain a clean water even though the level looks correct. Tested my cyanuric acid level after watching this…its its practically non existent. Combine that with a hot and dry summer with hardly any rain and that is probably the issue. Going to add stabilizer for the first time in 12 years 😀
I balance my pool with a Taylor CK – 2005 test kit about 2 months ago. Recently the past week my free chlorine has been registering over 10 ppm. I turned off the automatic chlorinator for the past week and the free chlorine does not seem to have lowered at all when testing daily. I use stabilized chlorine pucks and wondering whether that may be causing an issue. Any help you can provide would be appreciated.
Really bizarre to make a 10 minute about unstabilized chlorine but completely omit the most commonly used form — liquid chlorine (sodium hypochlorite = bleach). The tablets are certainly convenient but over 50% cyanuric acid by weight — not a “small amount” as stated in this video. Once tablets raise your level to 50ppm you will be at 80ppm very quickly and chlorine no longer effective. If using tablets switch to liquid once you hit 50 or you will soon need a partial drain and refill.
if a pool already has a decent amount of CYA in it, say 50 ppm. wouldn't unstabilized chlorine be protected from CYA regardless? so in that case there's no difference adding stabilized or unstabilized chlorine because there's enough CYA in the water to shield chlorine from the sun. Am I correct?
would a pool cover help with using less chloriine???
You suggest that a new pool owner should keep Cal hypo and Tri chor both on hand? What happens if they try to mix them? Also why would you put tablets in the skimmer that goes straight to the pump and filter, doesn't it sanitize better going straight to the body of water?
How do you do this with a jacuzzi?
Still pool learning! So this is great. I hadn’t realised there were two types of chlorine.
So hadn’t been shocking my pool! 🙈 I soon learnt after my PH became to high. We had an algae bloom.
We have now shocked the pool using unstabalised Chlorine. I may have over done it! My dip stick is the darkest colour for chlorine….. and it’s been cloudy all week 🙈😂 this pool maintenance stuff is hard work!!!
So which should you use if your town water has high CYA naturally? We filled the pool yesterday and tested today the chlorine level was white (which didn’t even register on the strip color) but the CYA was 80. Thanks
Once you let your CYA start to climb past 100ppm you start burning off the most expensive chem(chlorine) way too fast.
Don't use a floater, don't use stabilized chlorine (I only use cal-hypo every 10days).
Control your CYA levels (around 50-60) manually with conditioner.
You can safely keep your chlorine at a very low level (0.8-1.2ppm) if you keep your phosphates below 50ppm. (nothing for the chlorine to fight)
I use one cap of NoPhos every 10 days in my pool and my phosphates rarely climb above 50ppm.
I can walkaway from my pool for a month and nothing will happen.
Minimalize your chem usage by effecting the generators of problem (phosphates), not just fight the symptoms they cause, and you won't reach 2500 TDS for a long time (I easily get almost 4 years, where most people get a maximum of 3 years before needing to be drained)
👍
Is bleach stabilized or unstabilized chlorine?
I have been in the Commercial Recreation Industry part of pool use …. for over 65 years… ownership of commercial recreation pool facilities, advisor to school districts regarding their pools, and commercial and residential pool design (the 1984 Olympic committee used our design for filtration speed and efficiency for the pools used in the Los Angeles Olympics). It is such a pleasure to find a site that takes their time to thoroughly explain all aspects in such a manner, that the regular home pool owners can actually understand what information is being presented.
Please continue with presenting more information that answers the questions of regular and commercial pool owners.
Considering how expensive stabilized chlorinating tablets are, can you get away with just adding your standard chlorine and stabilizer?
I have a problem where my chlorine is never right. The only time it's stability reads ideal is after about 6 hrs -12 hrs after shocking it. Is it ok to shock my pool twice a week to keep the cholorine up. I have 3 chlorine tablets floating at all times. But the level starts low or under. It's only ideal when I shock it. I need help. The pool turns cloudy every few days. Not green just cloudy w no chlorine levels. Any advice anyone
I just had a new liner put in my in ground pool. I live in Alabama. I can’t seem to get my chlorine level up. I have added 6 bags of shock and 1 1/2 gallons of liquid chlorine and still can’t get the chlorine level up. Any suggestions
So how do you keep you cya from getting too high and also keeping your calcium from getting too high
or just add CYA to get to desired level and unstabilized chlorine daily.. then we don't continuously raise CYA.
Matt, should stabilizer be added to a pool with an automatic pool cover?
Love yóur videos just wondering if liquid chlorine is something you use or could use in place of tablets?
Can DPD 1 and DPD 3 tablets be used to test free chlorine and total chlorine when TRICHLOROISO CYANURIC ACID is the sanitizer
Can DPD 1 and DPD3 tablets be used for free chlorine and total chlorine field testing when TRICHLOROISO CYANIC ACID GRANULES 90% concentration is the disinfectant
My pool over the winter has insane algae. I have shocked it so much over the last week it should be glowing in the dark by now. But I still have algae stuck to the walls and staining. And the stains are more brownish red. Probably coming from the leaves from our trees falling in the pool. What are your suggestions for the algae stuck on the walls and the staining
Problem with stabilised chlorine is that the cyanauric acid doesn't dissipate like the chlorine and pretty soon you hit 50 ppm and then what? Switch to unstabilised or what?
Unless you want to dump your pool water every so often go ahead use pool tablets with added CYA. Because that is the only way to get rid of the CYA any amount over about 60 PPM. Otherwise you are wasting money on chlorine that doesn't work because of excess CYA.
Be careful with the CYA (stabiliser) … I ended up with readings too high and had to drain the pool
Can I use oxygen tablet instead of ozonator to my pool capacity 150000 liters. the oxygen tablet is used in fish forming if so what level of ppm of oxygen
I can’t get my cya up past 20 ppm. Some said it my be because of bacteria. I use in unstabilized chlorine. Should I switch to stabilized ?
what if your cya is high and you use stabilized chlorine..just dilute the water?
This is an amazing video. Thank u
I just use bleach and baking powder.. Pool is covered hen not in use. Auto robot runs 90 min daily… Pool has never been so clear over past 5 years. Ther is zero stuff in my skimmer of filter basket all year. I use cotton balls instead of sand. This is the cheapest and the cleanest my pool has ever been..EVER.. The only reading that shows low is stabilizer, but chlorine is 100% always perfect.. no need for stabilizer.. I have spent $30 all year for crystal clear pool.
You rock! Ty!
It appears I may be having a Chlorind Demand issue for the first time in 10 years. I tried increasing the chlorine with extra tablets in the return basket and some floaters along with the inline dispenser. Despite all the tabs disproving the chlorine level is still less than 0.5 but I am worried that my Cyanuric acid is getting too high as it approaching 80ppm where it is normally around 50ppm. Normally 2 bags of shock in my 25,000 pool in the evening takes care of the issue and leaves the pool chlorine at around 4ppm the next morning, but now the chlorine is still staying below 0.4ppm. PH and alkalinity are fine.
I am going to try some liquid chlorine, significantly less expensive than bags of shock, but I am not sure how much to add. I noted a recommendation of "You'll need about 52-104 oz of liquid chlorine per 10,000 gallons of water. This amount should get the chlorine level to between 5 and 10 ppm." So I am thinking approx 200oz or about 1.5 gallons. Any suggestions? If the liquid chlorine works, I will post an update.
If I add CYA to my pool and shock it, will the shock still burn off in the sun or will the CYA protect it from evaporating?
I don’t under why anyone would give you thumbs down?? So weird. Great job of explaining this stuff! I’m new to this and have learned a lot from your videos!
Great information and great job.
bro it will all burn off unless the pool has 30-50ppm
Is liquid shock effective as the bag???
What I realized is chlorine/pool chemistry is just crazy. Trichlor is mostly tablets but it does exist as granules and vice versa for dichlor. Calcium hypochlorite increase CH. dichlor increases cya. There’s stabilized and unstabilized chlorine in forms of granules/ shock and I bet even in forms of tablets. And then there’s completely different forms of “chlorinating” such as bromine, salt, and probably a whole lot more I don’t even know about. I give up, it’s just crazy.
Is "Sodium Dichloroisocyanurate": Dichlor or trichlor or is it dichlor with cyanuric acid?
What does it mean when my chlorine is high 10
But stabilizer zero
Stick readings
Also ph zero
"commonly shock is unstabilized chlorine".
If the shock lists "calcium hypochlorite", then it doesn't contain any CYA (cyanuric acid/stabilizer).
If the shock lists di-chlor… it does contain CYA/stabilizer.
My first time purchasing a 10 by 30 pool what should you recommend for cleaning products?