Buffers prevent, inhibit or slow down pH change due to small amounts...
Mixing trichlor with cal hypo will cause a fire and explosion.
AOP refers to any number of chemical or electrical processes that use...
UV (ultraviolet) light is used for disinfection and combined chlorine...
Ozone (O3) is one of the strongest oxidizers known. It is 25 times...
One gallon of liquid chlorine (sodium hypochlorite) 12.5% contains...
When salt is dissolved in water, ions are formed which are positively...
Chlorine gas is produced at the positive (+) electrode of an SWG...
1 lb of cal hypo 65% added to 10,000 gallons is about 8.0 ppm
CYA (cyanuric acid) increases the free chlorine requirement needed for...
Adding 25.6 fl oz of muriatic acid (HCl 31.5%) to 10,000 gallons of...
Indoor pools can benefit from using CYA.
The amount of salt needed for most SWGs (salt water chlorine...
Adding borate to the water keeps the pH from going up (pH buffer...
The LSI (Langelier Saturation Index) is based on
Trichlor and dichlor are acidic, have a low pH and will lower the pH...
With 30 ppm CYA in the water, 97% of all the chlorine in the water is...
Sodium carbonate (soda ash) added to pool water
The white flakes in a SWG pool are
It is okay to add calcium chloride (hardness increaser) and sodium...
How many gallons of water are there in 1 cubic foot (1 ft3)?
What is the weight of 1 gallon of water
Changing Temperature by 15°F will change the Langelier Saturation...
How many days should you wait to add the required amount of salt for...
Most bromine tabs are BCDMH and contain bromine, DMH and
Pool water must have a minimum calcium hardness of _______ ppm or it...
If the pH of the pool water is always increasing or going up, lowering...
2.0 ppm free chlorine in the water with a pH of 7.5 and 30 ppm of CYA...
Pouring acid into the water while standing in one place or adding acid...
The free chlorine level should be _______ % of CYA to kill algae...
As long as the free chlorine level in the water is between 2.0 and 4.0...
A pool service tech has a 16,875 gallon pool with a free chlorine...
The minimum calcium hardness needed to balance the water is?
The PCTI recommended Target for pH is
The pH of pool water can be raised by aeration and turbulence with no...
How many gallons are in a pool that measures 30' by 15' with...
CYA (Cyanuric Acid) only protects chlorine in water from being...
The PCTI recommended Target for Total Alkalinity is
1% is how may ppm?
What percent of chlorine is lost to sunlight in 2 hours with no CYA?
CO2 in water is in equilibrium with CO2 in the air. Removing CO2 from...
For each 10 ppm of chlorine added by trichlor, how much will CYA...
The PCTI recommended Target for Calcium Hardness for plaster pool...
There are 7 water balance parameters or conditions. They are pH, Total...
The PCTI recommended Target for CYA (cyanuric acid) with no SWG is
The Target level for borate in pool water with no SWG (saltwater...
The pH of the pool water usually goes up with a pool equipped with an...
Using the pH-Total Alkalinity Adjusting Charts beginning in Chapter...
A pool service company has a 20,000 gallon pool with a TA of 40 ppm....
Using liquid chlorine or other hypochlorites will raise the pH of the...