pH is the measurement of acidity of water - measured on a scale of
0 to 14 with 7 being neutral. A pH below 7.0 means the water is very acidic, as the pH approaches 8.0, the water becomes very basic (alkaline).
Not only do proper pH levels allow the other chemicals to do their
work, but it is important to note that low and high levels can cause damage to a vinyl liner. Under the right circumstances with pH below 7.0, the liner can actually grow and develop
unsightly wrinkles. High pH greatly accelerates the aging process and shortens the life of the liner and can cause scale to form on the liner.
Chlorine is much less effective at higher pH levels. At a pH of 8.0, chlorine is only 22% effective.
Alkalinity is a measuring of the alkaline materials dissolved in
water. With the alkalinity in the range of 100 to 150 PPM it helps pH to resist fluctuations. If the alkalinity is low the result is "pH bounce" in and out of range. A low
total alkalinity can cause wrinkles to form in the liner. Low pH and low total alkalinity usually go together.
Calcium Hardness refers to the amount of dissolved minerals in
water. A low hardness can lead to corrosion of pool surface, filter, heater, ladder, ect. A calcium hardness level that is too high causes cloudy water and scaling (white chalky appearance
and a sand paper feel on vinyl liner or fiberglass.).
Out of Balance Water
- Eye and skin irritation
- Unsightly wrinkles in vinyl liners
- Interferes with the efficiency of sanitizes
- Corrosion of metals (pump seals, heaters, lights, ect.)
- Cloudy water
- Scale build up (white chalky appearance) on pool surface as well as inside filter and heater
- Pitting and corrosion of gunite/concrete pools
The murky, dull appearance of cloudy water can leave the pool
looking uninviting. Cloudy water may also harbor contaminants and stain-makers.
Causes of Cloudy Water
Contaminants buildup: When swimmer wastes and other contaminants
build up, the result is "combined chlorine". Shock the pool!!!
Chemical residue: Using a calcium hypochlorite shock such as (*Bio
Guard Burn out Extreme, Smart Shock) can result in a residue build up and cloudy water. If the water looks like chalk or milk, it is usually the result of using a lot of calcium hypochlorite
shock. To use this type of shock, especially in vinyl liner pools to prevent bleaching of the liner, you must:
Water Out of Balance: A high pH, high Total Alkaline or High
Calcium Hardness will cause cloudy water. Test the water!!
- Fill a bucket about 1/2 full of water in a 5 gallon plastic bucket
- Whenever adding chemicals to the pool always wear eye protection.
- Add Shock - do not stir with a wood or plastic paddle - let
sit for a few minutes - pour only the liquid into the pool
- Discard the residue
- You can mix the residual up to 2 more times.
- Do not discard the residual into the trash.
Algae: Algae is a possible cause of cloudy water.
Poor Filtration: Is the filter system running a significant number
of hours every day? During the swim season, the filter needs to run a minimum of 12 to 14 hours daily.
Pools with cloudy water or algae.
Metals: The presence of metals in the water such as iron
(reddish-brown), copper (blue-green) or manganese (brown-red) can cause cloudy water. To remove the metals:
Adding Water Balance Adjustment Chemicals
- Add Keetrol Plus(Stain
& Scale Preventer) to remove any stains 1 quart for 25,000 for levels 2 ppm or below. above 2 ppm contact our pool Guru
- Use Keetrol Plus weekly to prevent reoccurrence
Follow the recommendation for adding balancing chemicals from the
chart below. Then pour in front of a return with the pump running.\
HOW TO ADD
Add directly to pool (1)
pH decreaser (dry form)
Add directly to pool
Add directly to pool (2)
Add directly to pool (3)
Add to skimmer SLOWLY (4)
Add directly to pool (5)
Add Directly to pool (6)
(1) If The pH level is below 7.0 then never add more than 1 pound of pH rise per 10,000 gallons of
pool water at least 30 minutes apart
(2)Never add more than 1 pound per 1,000 gallons of pool water at least 30 minutes apart.
(3)Never add more add more 1 pound per 1,000 gallons of pool water at least 30 minutes apart.
In concrete plaster pools premix calcium before add to pool water and add to deep end by return
jet. If you have a salt generator always turn the unit off for 24 hours after adding salt. This means you turn the production of chlorine off not the filter system.
(4)Make sure the strainer basket on the pump is clean. Remove the skimmer basket in the
automatic surface skimmer on the side of the pool. Use the skimmer closest to the filter equipment. Pour the stabilizer into the skimmer SLOWLY, make it look like a light snow flurry in the skimmer. This could take a bit of time so let the family member who has the most patients
do this job. THE CONSEQUENCES: Stabilizer is a very hard chemical to dissolve if you were to pour
it directly into the pool it would take over 30 days to dissolve. By pouring the stabilizer into the
skimmer the stabilizer will end up in the filter where the water will run over it at a high speed and
erode it quickly but not instantly it will still take at least 2 days to dissolve. So make sure you
don't clean or backwash your filter for at least 2 days. If you do clean or backwash your filter
before the 2 day period is complete you will clean or backwash the stabilizer out of the filter
before it has time to dissolve into the pool water and you will have lost it and have to add more.
This would be a very expensive lesson. The other consequence involves the speed at which you
pour the stabilizer into the skimmer. If you pour it to quickly it will clogg the pipe. When the
stabilizer sets up it will set up like concrete and be almost impossible to dislodge and it will take
1-3 years to dissolve. If you only have one skimmer this can be a real big problem SO BE VERY CAREFUL HOW YOU ADD THE STABILIZER. An alternative method t o adding stabilizer is to make
sure the pool is clean then spread the stabilizer widely across the bottom of the pool then vacuum
it up. The down side is if you vacuum the pool to quickly it will clog the line so don't let the stabilizer clump in large piles.
(5)Add salt directly to the pool in the shallow end only. If any salt sits on the bottom of the pool
brush it up until it is dissolved. Only purchase industrial grade salt. Do not use food grade salt or
water soften salt. Always turn the salt generator off for 24 hours when you add salt to the pool. This means you turn the production of chlorine off not the filter system.
(6) When you add muriatic acid to the pool it is either to lower the pH level or to lower the Total
Alkalinity. How you add this product will effect your results. If you are just trying to lower the pH
lever keep the pump circulating and spread the acid around the pool as much as possible. Be careful how you handle this hazerdous product DO NOT SPLASH IT ON YOU IT WILL BURN YOU
and wear old clothes while apply this product. If you are trying to lower the Total Alkalinity turn
the pump off and wait 1 hour then pour no more than one gallon of acid into a single spot at least 10 feet apart. How much acid depends on how high your Total Alkalinity is, we recomend you
take a water sample to a pool professional like a Bio Guard Dealer to determine how much acid
to use. Then leave the pump off for at least 30 minutes and then turn the pump on again.