Quick Answer: Why Is High CYA Bad?

What raises CYA in pool?

Cyanuric acid is raised by adding chlorine stabilizer containing cyanuric acid.

The only way to lower cyanuric acid is by replacing water..

What causes high cyanuric acid?

It seems like stabilized chlorine use is the main reason for high levels of CYA. As water evaporates, CYA stays behind, just like calcium and salt. If you are using a stabilized chlorine like trichlor or dichlor, CYA accumulates…fast. One pound of trichlor in 10,000 gallons of water will add 6 ppm of CYA.

What should my CYA level be?

Experts recommend between 30 and 50 ppm CYA for the right balance, and regulation requires less than 100 ppm CYA. But what happens when your pool’s levels rise above this? The chlorine can’t do its job – it’s bound to the CYA, instead of being free and available to sanitize and oxidize. That makes for a germy pool.

How much does it cost to drain a pool to lower CYA?

Dilution can also occur by rainfall, backwashing, and splash out. When you are ready to lower the level of Cyanuric Acid in your pool, determine first how much lower you need it to be. If you need it lowered by say, for example, 10%, then you must drain 10% of the water from your pool and replace it with new water.

Does cyanuric acid evaporate?

Cyanuric acid does not evaporate from a pool, and the only way to greatly lower a pool’s concentration of CYA is to partly drain the pool and refill it with fresh water. For Donohoe, it comes down to how the pool is used. … “Adding cyanuric acid slows down the kill rate of all pathogens.

Does CYA burn off?

Unlike chlorine, CYA does not dissipate, the only way to lower your stabilizer levels is to drain and refill a portion of your pool water. Chlorine Lock generally happens in older pools that use dichlor or trichlor tabs. These tabs can contain up to 50-60 percent CYA.

How much cyanuric acid is too much?

As long as the cyanuric acid concentration is less than 20 mg/l, there will not be any problem. Once a level of 70 mg/l is exceeded, cyanuric acid becomes problematic. Too high a concentration can, however, easily be solved. All you need to do is add fresh water to the pool (3 to 5% of the total volume).

How much CYA does a puck add?

Two 8 ounce pucks is one pound and one puck in 10,000 gallons increases CYA by 3.3 ppm.

Is high cyanuric acid dangerous?

Although cyanuric acid offers a low level of toxicity without any serious health concerns, having high-levels of this chemical in a pool puts people at risk because of the chlorine’s diminished ability to kill bacteria and viruses.

How do you lower cyanuric acid?

The easiest way to lower the levels of cyanuric acid in your pool is to simply dilute the water. Partially drain your swimming pool by the same percentage by which you want to reduce your cyanuric levels.

How do you fix high cyanuric acid in a pool?

If the CYA levels that are more than just a little high, diluting your pool water is the only way to lower them. Allow splashout to bring down your water level, then top off your pool with fresh water. If the levels are extremely high, you may need to drain your pool and refill it with fresh water.

Can you swim if cyanuric acid is high?

What happens when CYA in a pool is too high? – CYA Levels exceeding a threshold of 70 parts-per-million of cyanuric acid can reduce the effectiveness of the chlorine in a pool. The amount of time it takes to kill bacteria lengthens as the concentration of CYA increases.

Does CYA reduce over time?

RGS. ping said: CYA does reduce over time and a deep end discussion about it is in this thread, Degradation of Cyanuric Acid (CYA).

Does cyanuric acid lower pH?

The fraction that ionizes is pH-dependent. … At ideal pH (7.4 to 7.6) and cyanuric acid levels (30 to 50 ppm), the cyanuric acid/cyanurate system will not significantly contribute to the buffering of pool water. However, as the cyanuric acid levels increase, they will have an effect on the total alkalinity test result.

Is CYA 100 too high?

If your cyanuric acid level was at 100 ppm (way too high), and you want to lower it to 50 ppm, you will need to replace half the pool water (assuming your fill water has 0 ppm of CYA).

What happens if CYA is too high?

When cyanuric acid levels get too high, it can cause something referred to as chlorine lock, which basically means your chlorine has been rendered useless. You’ll know it has happened when your chlorine test shows very or little chlorine even right after you’ve added it to the pool.