Different DPD kits come in different forms. For example, some use liquid reagents, while others use solid tablets. [2] X Research source Liquid and tablet test kits are similar in their level of accuracy, but tablets may be easier to use because they do not require precise measurements of liquid reagents. While litmus strip kits are easier to use than DPD kits, DPD kits are more accurate when used correctly. Digital test kits have no obvious mechanism for indicating when test results are inaccurate (e. g. , colors that do not match the test chart), so their results can be misleading. Many Digital pH testers do however allow them to be calibrated[3] X Research source . If you do use a digital tester, get into the habit of double checking results from time to time with drop based reagents.
Read the directions closely to make sure you are using the test kit correctly and that you know how to interpret the results. Make sure you are using the correct reagent to test pH levels. Most kits use Phenol Red for this purpose. [5] X Research source
Test kits can also give incorrect results if the reagents are stored improperly (e. g. , in humid areas or extreme temperatures), or become cross-contaminated due to careless handling.
Pool pH needs to be checked more frequently when the pool is getting a lot of use, because anything that gets into the pool water (including natural oils from swimmers’ hair and bodies, traces of sunscreen and other body care products, or dirt that gets tracked into the pool) will affect the water’s chemical makeup.
Some forms of muriatic acid can be added directly to the pool, while others may need to be diluted in a bucket of water before use.
If you get muriatic acid in your eyes, immediately flush them with fresh, cold water for at least 15 minutes, then seek medical attention. If you get the acid on your skin, rinse your skin with fresh, cold water for at least 15 minutes, and remove any clothing that might have gotten acid on it. When you are done, seek medical attention. Get medical attention immediately if you swallow any of the acid or inhale the fumes.
You can also estimate how much acid to add by using an online pool calculator like this one: http://poolcalculator. com/.
Hold your container close to the water as you pour in order to minimize splashing. Be careful not to let the acid run over any pool fixtures or directly contact the wall of the pool.
You can also use a pool calculator, such as this one: http://poolcalculator. com/.
If you get sodium bisulfate on your skin, wash thoroughly with soap and water. Go to the doctor if you experience skin irritation that doesn’t go away after washing. If you get any sodium bisulfate in your eyes, rinse with cold water for at least 15 minutes and then get medical attention. If you swallow any of the powder, rinse your mouth out with water and drink at least one tall glass of water. Seek medical attention immediately.
Get close to the water when you pour, and take care not to let the wind blow any of the powder back onto you.
Don’t wait longer than 24 hours after adding the dry acid before re-testing your pool’s pH levels.
Soda ash can also raise your pool’s alkalinity, but may cause the water’s pH to become too high again. Follow the manufacturer’s instructions to determine how much of any alkalinity booster to add to your pool based on the size of the pool and the current alkalinity level. If you are using plain baking soda, you can use a pool calculator, like this one: http://poolcalculator. com/.
Some CO2 systems are fully automated, while others have to be controlled manually. Consult a specialist at a pool supply store to determine what type of CO2 system is best for your pool. These systems can be expensive, ranging in price from $300-$10,000 USD. However, a CO2 system may ultimately save you money, since it minimizes the need for frequent pH and chlorine adjustments.
