- Take water sample from at least 12" below surface
- Carefully measure sample of water to be tested
- Follow all instructions on test kit
- Hold bottle vertically to ensure uniform drop size
- Add drops slowly
- Avoid handling tablets with fingers
- Never interchange caps of reagent bottles
- Never use finger as a cap
- Thoroughly wash test tubes or cells between tests
- Test frequently and maintain records
- Do not add OTO reagents to pool!
- Avoid exposing test reagents to sunlight, freezing or high temperatures for prolonged periods
- Store test equipment properly. In a cool, dark area
- Replace test chemicals at the start of each season
Friday, September 2, 2011
Tips for Proper Swimming Pool and Spa Water Testing
Follow these tips to help you achieve the best possible pool and spa water testing results. Quality in/quality out.
Tuesday, August 30, 2011
Swimming Pool Filter Sizing
There is a formula for anything that you need to accomplish with regards to swimming pools, spas and hot tubs. Whether it’s a chemical adjustment or a piece of equipment that you need to replace and you want to be sure it’s the right size.
This article, as is stated in the title, is about choosing the right swimming pool filter to be sure that you’re getting the best performance and clearest pool water. Filters are one example when bigger is better!
Flow Rate / Filter Ability = Filter Size
Filter Ability for the different types of filters are as follows:
D.E. = 2 GPM per square foot
Cartridge = 0.375 GPM per square foot
Sand = 15 GPM per square foot
Ex: 75 GPM
Filter size for D.E., Cartridge and Sand would be:
75 / 2 = D.E ……. 37.5 sq ft
75 / 0.375 = Catr. …. 200 sq ft
75 / 15 = Sand …… 5 sq ft
Article by: Jef Kirchmaier, CPO, CPT, AEA, WQM
http://www.cpo2go.com
Swimming Pool Spa and Hot Tub Heater Output Per Hour
There is a formula for anything that you need to accomplish with regards to swimming pools, spas and hot tubs. Whether it’s a chemical adjustment or a piece of equipment that you need to replace and you want to be sure it’s the right size.
This article, as stated in the title, is about choosing the right heater to bring your pool, spa or hot tub water to the desired temperature.
Formula: Heater Output:
Pool Volume (gal.) x Temp Diff. X 8.33
Ex: 20,000 gal. pool that is 77 degrees and you want to
heat it to 83. It would be; 20,000 x 6 x 8.33 = 999,600. Thiss means that you would require a 1,000,000 BTU heater to get the pool up to temp in one hour.
Note: 1 BTU = 1 lb of water raised 1 degree F.
Note: 1 gal of water = 8.34 lbs.
To find heater input: Heater Output / Heater Efficiency
Ex: Heater output = 1,000,000 BTUs
Heater Efficiency = 80%
1,000,000 / .8 = 1,250,000BTUs (Heater Input)
Article by: Jef Kirchmaier, CPO, CPT, AEA, WQM
http://www.cpo2go.com
Swimming Pool Filter Ability Rate (FMR)
There is a formula for anything that you need to accomplish with regards to swimming pools, spas and hot tubs. Whether it’s a chemical adjustment or a piece of equipment that you need to replace and you want to be sure it’s the right size.
This article, as is stated in the title, is about figuring out the rate at which water will pass through the filter media. Measured in gallons per minute per square foot (GPM/sqft)
Formula:
Flow Rate / Filter size (in sq. ft.) = Filter Ability
Ex: Flow Rate = 111GPM
Filter Size = 55.5 sq. ft.
111 / 55.5 = 2GPM Filter Ability
Article by: Jef Kirchmaier, CPO, CPT, AEA, WQM
http://www.cpo2go.com
How to Calculate Swimming Pool Flow Rate
There is a formula for anything that you need to accomplish with regards to swimming pools, spas and hot tubs. Whether it’s a chemical adjustment or a piece of equipment that you need to replace and you want to be sure it’s the right size.
This article, as is stated in the title, is about how to calculate the flow rate of the pool water running through your system. This is an important calculation upon which many other pool formulas are based. In commercials pools and spas this is regulated by the State or Local Environmental Health Services and minimum flow rates are required.
Formula:
Pool Volume (gal) / Turnover Rate (minutes) = Flow Rate in GPM
In California (at this writing) the required turnover rates are:
Pools = 360 minutes (or 6 hours)
Spas = 30 minutes (1/2 hour)
Ex: a 40,000 gal pool would be: 40,000 / 360 = 111 GPM
Article by: Jef Kirchmaier, CPO, CPT, AEA, WQM
http://www.cpo2go.com
How to Calculate Turnover Rate for Swimming Pools and Spas
There is a formula for anything that you need to accomplish with regards to swimming pools, spas and hot tubs. Whether it’s a chemical adjustment or a piece of equipment that you need to replace and you want to be sure it’s the right size.
This article, as is stated in the title, is about calculating turnover rates. One “turnover” is the amount of time it would take for the volume of the pool or spa water to pass through the filtration system one time. Obviously, the water is constantly mixing and, therefore, not all of the water will be filtered in the time it takes for the total volume to pass through the system but that is not important. Turnover Rate is measured in hours.
Formula:
Pool Volume (gal) / Flow Rate (GPM) / 60 = Turnover Rate (Hours)
Ex: 40,000 gal pool with a flow rate of 111 GPM would be:
40,000 / 111 / 60 = 6 hour Turnover Rate
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