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The AquaChek TruTest Digital Test Strip reader is intended to provide a convenient alternative to visual color matching, with the ease of a digital display. The meter and test strips can achieve representative readings of pool and hot tub water conditions when following all directions and using properly stored and handled, unexpired test strips.
In general, results are comparable to other visual testing methods obtained by a person with good color matching ability. When the water sample being tested is near or outside of the Range of Results boundaries, results may not reflect acual water conditions. Consult a pool or hot tub professional when unusual water conditions, chemisty problems or questionable results occur.
After testing, consider these actions:
For more information on operation of the product, tips on water balance, or to seek customer or technical support, please visit the website, www.aquachek.com.
(#2, MIDDLE BUTTON)
Press memory button to view your last nine readings.
Test Strip Use
Range of Results:
Free Chlorine: 0-10 ppm
pH: 6.2-8.4
Total Alkalinity: 0-240 ppm
Install 2 "AA" batteries per the diagram.
Incorrect insertion will prevent the meter from turning on due to the design of the battery housing. USE ONLY ALKALINE BATTERIES. Use of any other type of battery may damage the meter and voids the warranty.
PRECAUTIONARY LABELS
Read all labels and tags attached the instrument. Personal injury or damage to the instrument could occur if not observed.
This symbol, if noted on the instrument, references the instruction manual for operational and/or safety information.
To ensure the protection provided by this equipment is not impaired, do not use this equipment in any manner other than that, which is specified in this manual.
To keep your pool at its best, test at each end a minimum of twice a week, and test your spa before each use.
Ideal Reading: Pool 1.0 – 3.0 ppm; Spa 3.0 – 5.0 ppm
To maintain a clean and clear pool, keep the free chlorine level in the right range. Free chlorine is the portion of the total chlorine remaining in chlorinated water that has not reacted to contaminants – and is "free" to go to work to kill bacteria and other contaminants.
Shock Treatment – Contrary to popular belief, a strong chlorine smell is not an indication of too much chlorine in the pool but actually a red flag that a super dose of chlorine may be required to correct the problem. Shock treatment adds a largerthan-normal amount of oxidizing chemicals to pool water. The ideal frequency for a super dose is every week, depending on use and water temperature.
Ideal Reading: 2.0 – 6.0 ppm
To obtain bromine result, multiply free chlorine value by 2.2. Bromine is a popular pool and spa sanitizer often used instead of chlorine. Environmental conditions (leaves, rain) and usage (how many folks are enjoying the pool or spa) will add contaminants in the water. Those contaminants will decrease the bromine existing in the water. Be sure to test the bromine before entering the water. Even if the system is dormant or not in use, you should test the bromine level at least weekly to prevent any buildup of bacteria or algae.
Ideal Reading: 7.2 – 7.8
Losing control of pH in the water unleashes a whole series of problems. The pH can damage metal equipment and plaster walls if it gets out of balance. A swimmer's body has a pH between 7.2 and 7.8 so, if the pool water isn't kept in this range, swimmers will start to feel irritation of their eyes and skin. Finally, the pH must stay in the proper range to maximize the efficiency of chlorine.
If the pH is low, below 7.2, the water is too acidic and it can damage the piping and pool surfaces under certain conditions. You can use sodium carbonate (soda ash) to increase pH when levels are too low. Other chemicals that can raise the pH are sodium bicarbonate and sodium sesquicarbonate.
Above 7.8, the water is more alkaline (basic) and under certain conditions can form deposits in the piping and on pool surfaces. Sodium bisulfate and muriatic acid can lower the pH when it gets too high.
Ideal Reading: 80 – 120 ppm
Total alkalinity is the measure of the water's ability to resist pH change. If the total alkalinity is low, the pH will fluctuate widely and be difficult to maintain. When total alkalinity is high, the pH can become difficult to move and the water can be scale forming.
Increasing Total Alkalinity – Sodium bicarbonate is the most effective and popular chemical for increasing total alkalinity. Other chemicals that can raise the total alkalinity are sodium carbonate (soda ash) and sodium sesquicarbonate.
Decreasing Total Alkalinity – When the total alkalinity is too high, you can lower it by using muriatic acid or sodium bisulfate.
See warnings for handling chemicals*
ppm=mg/L
Chlorination Chart – Pools
(Amount Needed to Introduce 1 ppm)
Type of Chlorine | Pool Volume | |||
5,000 gal. | 10,000 gal. | 15,000 gal. | 25,000 gal. | |
19 kL | 38 kL | 57 kL | 95 kL | |
Sodium Hypochlorite | 5 1/2 oz. | 10 1/2 oz. | 1/2 qt. | 3/4 qt. |
163 mL | 310 mL | 473 mL | 710 mL | |
Dichlor | 1 oz. | 2 1/4 oz. | 3 1/4 oz. | 5 1/2 oz. |
28.3 g | 63.8 g | 92.1 g | 149 g | |
Calcium Hypochlorite | 1 oz. | 2 oz. | 3 oz. | 5 oz. |
28.3 g | 56.7 g | 85 g | 142 g | |
Trichlor | 3/4 oz. | 1 1/2 oz. | 2 1/4 oz. | 3 3/4 oz. |
21.2 g | 42.5 g | 63.8 g | 106 g |
Superchlorination Chart – Pools
(Amount Needed to Introduce 10 ppm)
Type of Chlorine | Pool Volume | |||
5,000 gal. | 10,000 gal. | 15,000 gal. | 25,000 gal. | |
19 kL | 38 kL | 57 kL | 95 kL | |
Sodium Hypochlorite | 1 3/4 qts. | 3 1/4 qts. | 1 1/4 gal. | 2 gal. |
1.7 L | 3.0 L | 4.7 L | 7.6 L | |
Dichlor | 11 oz. | 1 1/3 lbs. | 2 lbs. | 3 1/3 lbs. |
311 g | 605 g | 908 g | 1.5 kg | |
Calcium Hypochlorite | 10 oz. | 1 1/4 lbs. | 2 lbs. | 3 1/4 lbs. |
284 g | 568 g | 908 g | 1.5 kg |
Chlorination Chart – Spas
(Amount Needed to Introduce 4 ppm)
Type of Chlorine | Spa Volume | |
250 gal. | 500 gal. | |
948 L | 1.9 kL | |
Dichlor | 1/4 oz. | 1/2 oz. |
7.0 g | 14.2 g | |
Sodium Hypochlorite | 1 oz. | 2 oz. |
29.6 mL | 59.1 mL | |
Lithium Hypochlorite | 1/2 oz. | 1 oz. |
14.2 g | 28.3 g |
Superchlorination Chart – Spas
(Amount Needed to Introduce 10 ppm)
Type of Chlorine | Spa Volume | |
250 gal. | 500 gal. | |
948 L | 1.9 kL | |
Dichlor | 2/3 oz. | 1 1/4 oz. |
18.9 g | 35.1 g | |
Sodium Hypochlorite | 2 1/2 oz. | 5 oz. |
74 mL | 148 mL | |
Lithium Hypochlorite | 1 oz. | 2 oz. |
28.3 g | 56.7 g |
Raising pH with Soda Ash (Sodium Carbonate)
(When pH is under 7.2, add the amount of soda ash indicated below, then retest)
pH Level | Pool Volume | ||||
1,000 gal. | 5,000 gal. | 10,000 gal. | 15,000 gal. | 25,000 gal. | |
3.8 kL | 19 kL | 38 kL | 57 kL | 95 kL | |
7.0 - 7.2 | 3/4 oz. | 4 oz. | 8 oz. | 12 oz. | 1 1/4 lbs. |
21.3 g | 113 g | 227 g | 340 g | 568 g | |
6.7 - 7.0 | 1 1/4 oz. | 6 oz. | 12 oz. | 1 lb. | 2 lbs. |
35.4 g | 170 g | 340 g | 454 g | 908 g | |
Under 6.7 | 1 1/2 oz. | 8 oz. | 1 lb. | 1 1/2 lbs. | 2 1/2 lbs. |
42.5 g | 227 g | 454 g | 681 g | 1.1 kg |
Lowering pH using Dry Acid (Sodium Bisulfate)
(When pH is over 7.8, add the amount of acid indicated below, then retest)
pH Level | Pool Volume | ||||
1,000 gal. | 5,000 gal. | 10,000 gal. | 15,000 gal. | 25,000 gal. | |
3.8 kL | 19 kL | 38 kL | 57 kL | 95 kL | |
7.8 - 8.0 | 0.1 lb. | 0.3 lb. | 0.6 lb. | 0.9 lb. | 1 1/2 lbs. |
45 g | 136 g | 272 g | 408 g | 681 g | |
8.0 - 8.4 | 0.2 lb. | 0.5 lb. | 1 lb. | 1 1/2 lbs. | 2 1/2 lbs. |
91 g | 227 g | 454 g | 681 g | 1.1 kg | |
Over 8.4 | 0.3 lb. | 0.8 lb. | 1 1/2 lbs. | 2.3 lbs. | 4 lbs. |
136 g | 363 g | 681 g | 1 kg | 1.8 kg |
Raising Alkalinity With Sodium Bicarbonate
Increase in Total Alkalinity in ppm | Pool Volume | ||||
1,000 gal. | 5,000 gal. | 10,000 gal. | 15,000 gal. | 25,000 gal. | |
3.8 kL | 19 kL | 38 kL | 57 kL | 95 kL | |
10 | 2 1/2 oz. | 12 oz. | 1 1/2 lbs. | 2 1/4 lbs. | 3 3/4 lbs. |
62 g | 340 g | 681 g | 1 kg | 1.7 kg | |
20 | 4 3/4 oz. | 1 1/2 lbs. | 3 lbs. | 4 1/2 lbs. | 7 1/2 lbs. |
135 g | 681 g | 1.4 kg | 2 kg | 3.4 kg | |
50 | 12 oz. | 3 3/4 lbs. | 7 1/2 lbs. | 11 1/4 lbs. | 18 3/4 lbs. |
340 g | 1.7 kg | 3.4 kg | 5 kg | 8.5 kg |
Lowering Alkalinity With Dry Acid (Sodium Bisulfate)
Decrease in Total Alkalinity in ppm | Pool Volume | ||||
1,000 gal. | 5,000 gal. | 10,000 gal. | 15,000 gal. | 25,000 gal. | |
3.8 kL | 19 kL | 38 kL | 57 kL | 95 kL | |
10 | 2 1/2 oz. | 12 3/4 oz. | 1 1/2 lbs. | 2 1/2 lbs. | 4 lbs. |
62 g | 361 g | 681 g | 1.1 kg | 1.8 kg | |
20 | 5 oz. | 1 1/2 lbs. | 3 1/4 lbs. | 4 3/4 lbs. | 8 lbs. |
142 g | 681 g | 1.5 kg | 2.2 kg | 3.6 kg | |
50 | 12 3/4 oz. | 4 lbs. | 8 lbs. | 12 lbs. | 20 3/4 lbs. |
361 g | 1.8 kg | 3.6 kg | 5.4 kg | 9.4 kg |
* Exercise extreme caution when handling chemicals.
Optimal Levels
Test | Ideal Reading |
Free Chlorine – Pool Free Chlorine – Hot Tub Bromine | 1.0 - 3.0 ppm 3.0 - 5.0 ppm 2.0 - 6.0 ppm |
pH | 7.2 - 7.8 |
Total Alkalinity | 80 - 120 ppm |
TROUBLESHOOTING TIPS
If TruTest readings are higher or lower than expected, these differences are likely due to technique.
If the problem is... | Possible Cause | Solution |
Algae | Green, black or pink algae | Treat with algaecide or superchlorinate and backwash. |
Yellow/mustard algae | Superchlorinate or treat with algaecide. Brush and vacuum required. Backwash filter. | |
Corrosion | Low pH or hardness levels | Increase levels to balance water. |
High salt or TDS concentrations | Add fresh water to dilute. | |
High chlorine or bromine levels for extended period of time | Remove source of sanitizer and allow level to drop. Add fresh water to dilute if necessary. | |
Foul Odor | Foul chlorine odor: chloramine level is too high | Shock to eliminate combined chlorine. |
Rotten egg smell: excess metals present | Add sequestering agent to reduce metal level. | |
Foam on the Water | Hardness too low | Adjust up. |
Some algaecides produce foam | See manufacturer' s directions. | |
Source unknown | Add defoamer. | |
Cloudy Water | High pH, alkalinity, calcium or TDS can contribute to cloudy water | Reduce levels or add fresh water to dilute. |
Reduced filtration | Check for blockage and clean traps. | |
Heavy bather load | You may need to superchlorinate. | |
Unable to Maintain Free Chlorine (or other primary sanitizer) | High TDS or pH | Reduce levels or add fresh water to dilute. |
High combined chlorine level | Superchlorinate. May require double dose or more. | |
Sunlight dissipating chlorine | Add cyanuric acid (stabilizer). | |
Heavy bather loads | Increase sanitizer distribution. | |
High nitrate level increases chlorine demand | Add fresh water to dilute. | |
Colored Water | Green: algae growth, low free chlorine, or high nitrate level | Treat with algaecide and/or superchlorinate. |
Reddish-brown: high iron or manganese | Add sequestering (or chelating) agent. | |
Blue-green: high copper | Add sequestering agent. | |
AquaChek TruTest Gives No Free Chlorine Reading, but DPD Kit Gives a High Free Chlorine Reading | Very high chloramine level (High combined chlorine can cause DPD #1 kits to give false readings for free chlorine.) | The free chlorine reading on your AquaChek meter is correct! This is a common problem at the beginning of the season. Test for total chlorine using AquaChek® Select® or AquaChek® 7. You may need to shock the water. |
Scale Buildup | Calcium hardness level too high | Add fresh water to dilute. |
Total alkalinity, pH or TDS too high | Adjust down or add fresh water to dilute. | |
Calcium hardness level too low; rough soft water scale forms | Increase hardness level. | |
Metals present in high levels leading to buildup | Add sequestering agent to reduce metal content. | |
Swimmer/bather Skin and Eye Irritation | High or low pH or alkalinity, or both | Maintain pH and alkalinity at ideal levels for optimum swimmer comfort. |
High free chlorine level | Remove source and allow level to drop. Add fresh water to dilute if necessary. | |
High chloramine (combined chlorine) level | Shock (superchlorinate) to remove combined chlorine. | |
Recurring Algae Growth | High nitrate level | Add fresh water to dilute. |
Insufficient free chlorine content | Maintain an ideal level of free chlorine. Increase dosage if necessary. | |
Leaves, pollen or other organic waste frequently enters pool system | Keep covered when possible during peak times of contamination. | |
High phosphate levels | You can add a phosphate control chemical. | |
Green Hair | Elevated copper in the water | Test copper level. Reduce copper level with a sequestering agent. |
Extremely high free chlorine level (around 50 ppm) can bleach hair | If free chlorine level is excessive, keep bathers out of water until level drops. | |
Cheap shampoo | Find a new hairdresser. |
www.AquaChek.com/Trutest
1-888-AquaChek
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
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