What does a pool ionizer do
John Parsons
Updated on April 05, 2026
Pool ionizers, sometimes called mineralizers, are based on the principle of adding copper to pool water. Ionizers release heavy metals that can kill bacteria when exposure is long enough. But pool ionizers have drawn a lot of scrutiny from government authorities.
Do pool ionizers really work?
There is evidence that pool ionizers effectively help eliminate bacteria and harmful pathogens in addition to preventing algae. At least one study has concluded that combined with low levels of chlorine, ionizers were more effective at keeping pools sanitized than higher levels of chlorine alone.
How long do pool ionizers last?
Swimming pool ionizers use a cell to house the minerals that are released into the water. This cell is usually composed of two rods that are either copper or a mix of copper and silver. As the minerals are released into the water, the rods wear down and typically need to be replaced every 6-12 months.
How long does it take for a pool ionizer to work?
Ionizers often require a lot of time before becoming effective in water. On average, expect the pool ionizer to take up to two weeks before the silver and copper ions can accumulate adequately in the water. It may also take a few more days for the ionizers to give their full water purification results.What should pool ionizer be set on?
As a result, ionizer manufacturers suggest keeping the pH between 7.2 and 7.4 and alkalinity between 90 and 120 ppm. By keeping pH and alkalinity at these levels, the water can have up to 0.5 ppm copper without causing staining.
How do I lower the pH level in my pool?
To bring down pH, use a made-for-pools chemical additive called pH reducer (or pH minus). The main active ingredients in pH reducers are either muriatic acid or sodium bisulfate (also called dry acid). Reducers are readily available at pool supply stores, home improvement centers and online.
How do you maintain an ionized pool?
Any form of chlorine, whether liquid, tablet, or salt generated will do the trick. We recommend using 3” stabilized chlorine tablets. We suggest adding one tablet every two weeks in pools up to 25,000 gallons. For larger pools up to 40,000 gallons, we suggest one tablet every week.
Do you need chlorine with an ionizer?
Pool ionizers must be used in conjunction with chemical sanitizers. … You must shock your pool water with chlorine, bromine or another acceptable chemical as recommended for the volume of water in your pool. If you run your pool ionizer continuously, you’ll likely need to shock your pool once a week.How do you know if your ionizer is working?
Ionization Test Kit Hold the meter approximately one foot (30.5 cm) in front of the ionizer. Monitor the display. The value displayed is the offset balance of the ionizer, which is the difference between the number of positive and negative ions being emitted.
Is copper bad for your pool?“A lot of people think it’s chlorine, but it’s not, it’s copper in the water that causes the green color.” … Experts say copper is often found in chemical agents used to rid pools of algae, but high levels can be dangerous.
Article first time published onDo copper pool ionizers work?
Ionizers release heavy metals that can kill bacteria when exposure is long enough. But pool ionizers have drawn a lot of scrutiny from government authorities. These authorities argue that silver and copper ionizers have not been proven adequately effective in controlling human pathogens in a swimming pool or spa.
Can you shock a pool with an ionizer?
Floating ionizers such as Floatron use solar power to produce low levels of ions. Copper and Silver ions reduce the amount of micro-contaminants in the pool water, which reduces your chlorine demand. Some folks use a pool ionizer continuously, and shock the pool weekly, eliminating the need for tablets.
Is it OK to swim in a pool with high pH?
A swimming pool with a high pH is considered alkaline, which can cause issues with the pool and swimmers. … This means bacteria and other microorganisms may thrive in your pool. While you cannot see with your naked eye, bacteria in your pool water can be harmful when they enter your body.
Does shocking pool lower pH?
Shocking your pool is important, but if you’re using cal-hypo (calcium hypochlorite), it can raise your pool’s pH levels. Don’t stop shocking your pool, but do test all your chemistry levels consistently, especially after shocking.
Why is my pool pH always high?
Pool pH is Always High The most common reason for a consistently high pH level in pools is the use of liquid chlorine or a saltwater system as the primary sanitizer. … New pool plaster or pebble finishes will also raise pH in pools for about a year after installation.
How do you clean an ionizer?
Only use a slightly moist cloth (preferably a microfibre cloth) to simply wipe the appliance, focusing especially on the carbon brush. Wipe it at least once a month. If the brush is hard and sticky on touch, you can use a small amount of mild soap to dissolve the dirt.
How do I raise the copper level in my pool?
The total dissolved solids (TDS) of the water must be at a minimum of 1000 ppm in order for the copper to reach optimal levels. This is done by adding pool-grade salt to the water. After the salt has been added, add 20lbs of Optimizer (maybe more for larger pools) and 1 bottle of Easy Shock & Swim.
How is ionized air measured?
The ion concentration in the air is measured with ionometers. These measurement devices usually contain an external tube electrode in which an additional, smaller tube electrode is insu- lated and a fan. DC voltage is applied to both electrodes and hence an electrical DC field is generated between both tube electrodes.
Does copper make pool water green?
For instance, the use of copper parts requires a lot of pool care. This is because when the pH gets too low, metal parts (especially copper) will corrode into the water, forming a copper solution. Copper then comes out of the solution when oxidized by chlorine, causing a green color in your pool water and parts.
What happens if you swim in a pool with high copper?
Iron can cause rust-colored stains to develop on the finish of the swimming pool, while copper can cause the swimming pool to finish or water to appear green.
Is it safe to swim in a pool with iron?
Swimmers will not want to swim in water that’s high in iron; it will appear uninviting and dirty. … Chlorine must be removed to miniscule amounts before you attempt to bring down the iron levels. Since the source is typically the well, it’s recommended you add Iron Remover while the swimming pool is filling up.
Can you use an ionizer in a saltwater pool?
In reality, salt water pools have the same amount of chlorine as pools treated with chlorine directly, which is typically 1ppm to 3ppm. … Pool Ionizers release microscopic mineral ions into the water that control bacteria and algae. This allows you to lower the chlorine concentration to 0.6ppm.
Where do you put ionizer?
The ionizer tee should be placed on the return line after the pump, filter and heater. If there is no room on that stretch of plumbing, it can be placed anywhere and it will still work. If you are adding an ionizer to a salt water pool, we recommend putting the tee before the salt cell.
Can I use vinegar to lower pH in pool?
Ordinary household vinegar could in theory be used to lower the pH of your pool. The pH of vinegar is about 2.5, which is quite acidic when compared to your pool water. Household vinegar is very weak though (when compared to a strong acid like muriatic acid), so you would need quite a bit to lower pH.
Does adding chlorine increase pH?
Using liquid chlorine raises the pH of the water. Liquid chlorine does not raise pH. When added to water, liquid chlorine (which has a pH of 13) makes HOCl (hypochlorous acid – the killing form of chlorine) and NaOH (sodium hydroxide), which raises pH. … So the net effect on pH is zero (or almost zero).
Will baking soda lower chlorine level in pool?
Chlorine works most efficiently in water with a neutral pH level between 7.4-7.6. If the pool is too alkaline, or more than a pH of 8.0, the efficiency is less than 20 percent. … To raise your pH levels, it can be as simple as adding seven to nine pounds of baking soda to your pool water.