It remains in the pool water until it is either splashed out, backwashed, or drained. It can also be diluted when water is added or after heavy rains. Pools open year-round should test the CYA concentration levels in the water at regular intervals. Those opened in the springtime should be tested only after the pool filter has been on and circulating the water for about three to five days. This is because cyanuric acid is denser than water, and without the filter on and water circulating, it sinks and settles on the bottom of the pool.
Keep in mind, if using stabilized chlorine each week, trichlor tablets or dichlor shock , that CYA is added with each application. Knowing how to add stabilizer to a pool is just as important as knowing when. To achieve the recommended amount of 30 ppm, add one pound of CYA stabilizer per 4, gallons of water.
The chemical is a strong acid so wearing gloves and goggles when preparing the solution is well-advised. Using a stabilizer with your chlorine will help it last longer and go farther.
This means that you will need to refill drums or add chemicals less often, which will not only reduce your exposure to harsh chemicals but will also save you money on your chlorine needs. Stabilized chlorine is less prone to dramatic swings and for many makes it easier to maintain the proper chlorine balance.
This is not to say that pool stabilizer is without its issues or that you have to use this to keep your pool safe and clean. The thing about pool stabilizer is that, when too much is used, it can have the opposite effect, rendering your chlorine inactive.
This can spiral out of control to the point where you can add as much chlorine as you want, but it will be immediately rendered inactive when it makes its way into the pool. When this happens, you will need to do a partial drain of your pool to allow you to add fresh water to dilute the pool water. It will take a lot more effort and chemicals to manage your pool with unstabilized chlorine, but it is not impossible to do so. If you have an indoor pool, unstabilized chlorine is likely to be the best option for you.
For outdoor pool owners, stabilized chlorine likely makes the most sense. This will make it easier to keep your pool water clean and safe. Add several hundreds pounds of pure pool salt , and plug-in the controller and salt cell to make the magic. Salt Cells need some repair or replacement parts every years, but in the long run a salt system can cost around the same as the cost of using tablets.
But of course, like using liquid chlorine, no stabilizer is added to the chlorine that your salt system creates, although maintaining a ppm CYA level is recommended for most outdoor pools. People also like the ease of use of a salt system, and the soft silky feel of the water. Cal Hypo feeders are used to spray individual tablets with water, slowly one at a time, to release the non-stabilized chlorine into the return line.
Like Cal Hypo shock , Cal Hypo tablets are unstabilized chlorine tablets , containing no cyanuric acid.
Cal Hypo tablets are more expensive than regular tablets to buy, and the specialized feeders required to use them are also on the pricey side. For pools in hard water areas, Cal Hypo tablets will add calcium to the water, in about the same amount as Trichlor tablets add cyanuric to the water — so you may be trading one problem for another.
There is a fourth method or alternative practice, which may work for some, and that is to reduce the amount of stabilized chlorine tablets used, by reducing the chlorine demand.
This can be done by augmenting or supplementing your chlorine with a Nature2 Express or Frog Mineral system , along with regular pool shock treatments, good water balance and good filtration practices. Most people cut their chlorine tablet usage in half when using a mineral purifier!
Take the fourth method above, and add another alternative sanitizer like Ozone or UV purifiers to the mix, and you can stop using chlorine tablets altogether.
Additional helper chemicals like Clarifiers or Algaecides or Enzymes can also be employed if needed. For pool chlorination, there are two main types of chlorine — hypochlorites or isocyanurates.
Sodium Hypo liquid chlorine is a popular choice where available, however due to the very high pH 13 of liquid chlorine, a gallon of acid is required for every 10 gallons of bleach used, and maintaining constant pH and alkalinity levels can become difficult. Liquid chlorine systems also require a safe space for large chlorine vats, and close access for a bleach delivery truck. Cal Hypo granular or tablets are another choice for large pools with high chlorine demand. Granular has a fairly high level of pH 11 , but tablets are lower 9.
They both do the same job but if you have a good pool chemistry and just want to top the chlorine up a little then adding unstabilised chlorine will be the best bet. If your levels are low and you intend on using the pool during the day a stabilised chlorine will be best. When choosing to purchase a swimming pool you may get overwhelmed with the amount of choices you have. This guide to help you understand the swimming pools and help you decide what pool you need.
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