This type of chlorine is popular for pool use because it's relatively cheap. It requires the addition of cyanuric acid to keep it stable in sunlight. Due to its high calcium component and high pH level, it tends to form deposits on spa heater parts and plumbing fittings, and may also leave an unattractive film or ring at the hot tub's water line. It is one of the most caustic forms of chlorine on the market, so avoid it in spas.
If you are going to use chlorine, sodium dichlor is well worth the few extra pennies in weekly cost. Do yourself a favor, and keep household bleach away from your spa! Not only is bleach a poor sanitizer at higher water temperatures, it readily affects pH balance and tends to have a much harsher chlorine odor.
Household bleach can easily splash on surrounding surfaces, including your spa cover, and may cause permanent damage. Bleach also reduces filter life when used for cleaning. First, Free Chlorine does the job of killing bacteria and oxidizing contaminants. When you add chlorine to the water, you are adding Free Chlorine. When the Free Chlorine reacts with contaminants such as oils, bacteria and other organics, it becomes combined chlorine, or chloramines.
Unlike combined bromine, combined chlorine has little sanitizing ability, and no oxidizing ability.
Chloramines also have an irritating odor. Combined chlorine, then, is like a spent bullet. Chloramines have a harsh odor, and can cause red eyes and irritation. You'll have less chance of these problems if using bromine and can avoid them altogether with an alternative sanitizer.
Therefore, when total chlorine is higher than free chlorine, combined chlorine must be present. In that case you need to shock or superchlorinate your pool or spa. Shocking with OxySpa non-chlorine MPS shock, or dichlor in an extra large dose will actually oxidize the combined chlorine and destroy the chloramines. Dichlor Granular Chlorine. Skip to main content. The tablets are just 1 inch in diameter, so users can add a small amount of chlorine to adjust the water chemistry to the appropriate pH and chlorine balance.
This package of trichlor chlorine tablets can treat pools, spas, and hot tubs that have up to 5, gallons of water. Due to the stabilizer in these tablets, the chlorine released into the pool water is resistant to UV radiation, slowing the production of chloramines. However, the tablets are not individually wrapped, so there may be some chipping and breaking.
When selecting a chlorine dispenser for the pool, consider the convenience of a floating dispenser. This AquaAce pool chlorine floater dispenser is easy to load with chlorine and can be used in any pool. It is made of strong, durable plastic and features 15 flow vents that are fully submerged, allowing water to slowly dissolve the tablets over several hours.
This chlorine tablet dispenser is wide enough to hold 3-inch tablets and has enough space to load up to five chlorine tablets at a time. Users can adjust the flow of water through the dispenser by twisting the base to open or close the flow vents. This allows manual control of the chlorine release to prevent its concentration in the water from growing too high.
However, this pound bucket of 3-inch chlorine tablets from HTH is made with a trichlor chlorine formula that can be used safely in saltwater systems, according to the manufacturer. Each tablet effectively treats about 10, gallons of water. Once the tablet has dissolved in the pool water, it releases the chlorine to kill bacteria, insects, and algae spores for up to one week. Chlorine tablets are a necessary addition to maintain most swimming pools, along with pool pumps and filters.
However, not everyone knows how they work or how to use them. For answers to these concerns and more, take a look at some of the most frequently asked questions about chlorine tablets. Chlorine tablets contain high amounts of chlorine that are released into the pool water to control and kill bacteria, algae, insects, and other microorganisms.
The chlorine can also cause strong odors in enclosed spaces that are harmful if inhaled in large doses. You can add chlorine tablets to the pool in several ways.
Use a floating chlorine dispenser that holds the tablet in a basket until it is fully dissolved. Place the tablet in the pool skimmer where the water will be pulled over it, quickly and efficiently adding chlorine to the pool water. Finally, load an automatic chlorine dispenser with a tablet and set it for a specific chlorine level.
The dispenser gradually releases the chlorine to the pool with little effort. The specific number of chlorine tablets you should add per week depends on the size of the pool and the size of the tablets. Answer: Ascorbic acid should remove metal stains if the right amount is added.
Make sure free chlorine level is 0ppm because chlorine reacts with metal forming stains. Raise free chlorine to normal level only after clearing all the stains.
If it goes green after shocking it, it's possible you have Copper metal in your pool or fillwater causing green stain when chlorine is added. Copper stains are common if you use well water or copper based Algaecide in your pool. Before you add chlorine, add Metal Magic by ProTeam to remove copper metals through your pool filter.
I added 1 gallon of super chlorine last night but pool is still very green after shocking 12 hours ago and running filter all night. Since shocking, my free chlorine is now testing between , ph level high so not sure if I should add another gallon of chlorine?
Why is it still so green after shocking and what can I do to fix it? You got it wrong James. Sodium hypo is basically liquid chlorine coming with Since Sodium Hypo has low chlorine percentage, it's best for daily chlorinating as compared to cal hypo. Also, cal hypo increases Calcium and pH levels in water and if you use it daily, your pH, CH, and FC level will be very high in the end.
I have done much reading on this subject and yours is the only article I have read so far that indicates that calcium hypo is for algae only and not to be used as regular chlorine maintenance.
I use HTH super shock which is granular calcium hypo and package indicates it treats algae and bacteria. Their sanitizer also treats algae and bacteria which would indicate a sodium hypo. The super shock, calcium hypo, packaging saus it can also be used for weekly maintenance in smaller dosages whereas you indicated sodium hypo can only be used for weekly.??
Pls explain. We have liquid shock to add to the pool. So the question that I have for you is If the water is not cloudy, you will need around 0. So the best thing to do is to take reading for free chlorine and then adjust the reading.
The most common cause of foam in a pool is low level calcium, which softens pool water making it prone to forming. Using low grade Algaecide like polymer may also be a cause. Green water is caused by algae and you need to get rid of the algae as soon as possible using plenty of liquid chlorine.
Ensure that all chemicals especially pH is well balanced before adding chlorine. Have white foam on top of water after shocking severely. Bad green pool. Told by pool store to use 25 lbs. The last application caused white foam. I can't get rid if it. What do I do? Shock is the only chemical in water. Just opening pool. Hi Robert, a swimming pool needs shocking regular all seasons including fall. Before shocking a pool during the fall, you have to do some cleaning using a net and vacuuming equipment to remove dirt.
A 20 x 40 pool will not require much chlorine shock. However, the best thing to do is to take the reading of free chlorine level in your water on a regular basis and ensure it is always between 2.
Generally, 0. Have you heard of shocking your pool in the fall? If so how much liquid for a 20 x 40 vinyl in ground pool. Thank you so much for the response! It was very helpful. We bought shock and algae guard. We bought the brand hth super. Wish us luck! Hi Ashly, the green stuff is algae. Do more scrubbing of the walls and then use algaecide or shock the pool with enough chlorine to kill the algae.
You can then vacuum the pool or use a net to remove the scrubbed aglae. Hi, great article. Our pool is 1 year old and we have had a Huge heat wave this summer. We have green growing on the walls only.
I scrub the walls every day now. We don't have green water. I do the chemicals so far. They read perfect. I shocked the pool last week but, the green keeps coming back. Any suggestions for the green walls? Thank you!! Hello FlorencePonk, sorry for the late response. You can use Muriatic acid to lower both pH and Alkalinity in your pool.
You need to be careful while adding Muriatic acid so that your Alkalinity is kept between 80 and ppm for your vinyl liner pool. However, in the process, your pH may go down below the recommended level of 7. Hi, I'm really new to taking care of a swimming pool and this year I only have one of those "Summer Waves" 10ft by 30" vinyl pools with the inflatable ring around the top.
I've just been using some 3 in 1 poo, and spa test trips, which in most cases have been showing me that everything is okay, however now the Ph level and alkalinity are just very, very slightly high and I can't find any information on how to just tweak those levels just a tiny bit in such a small pool to bring it back down to normal.
Hi Amanda, sorry for the trouble. Green pool means you have green algae; I hope you got the link to a complete guide on how to get rid of algae in this article. Wish you good luck! Thanks for all this good information; this is a very small pool but is sad to find it green when my grand kid want to ge in it Im a single mom and never own a pool.
Hi Gerri, this article was published purposely for individuals who are green in shocking a swimming pool. The article is also divided into different sections and there is a clear guide on how to shock your pool at the bottom section. It also includes a detailed video at the end showing you how to shock your pool if you need a quick guide.
This article is much too wordy. Home Appliances. Air Conditioners. Water Heaters.
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