Thursday, March 26, 2015

Swimming Pool Volume, Surface Area, Turnover Rate, Flow Rate other conversions.

AMOUNT CONVERSIONS
Ounces to Pounds: Ounces/16 = Pounds
Fluid Ounces to Gallon: Fluid Ounces/128 = Gallons
SURFACE AREAS
Circle: 3.14 x radius x radius = Square Feet
Rectangle/Square: Length x Width = Square Feet
Triangle: (Length x Width) / 2 = Square Feet
POOL VOLUME
Surface Area x Average Depth x 7.48 = GALLONS
Average Depth = (shallow depth = deep depth) / 2
TURNOVER RATE
Pool Volume / Flow Rate / 60 = Hours
FLOW RATE (MINIMUM)
Pool Volume / Turnover Rate (hours) / 60 = (GPM)
FILTER SURFACE AREA

Flow Rate / Filter Media Rate = Square Feet of Filter Surface Area Needed



Friday, March 13, 2015

D.E. and Cartridge Filter Cleaning


DIATOMACEOUS EARTH (D.E) / CARTRIDGE FILTERS


Diatomaceous earth (D.E.) removes the smallest particle size of any pool and spa filtration device. Tiny fossilized skeletons of small sea plankton (diatoms) are used to trap undissolved material. D.E. filtration is said to be in the 2 to 6 micron range. The D.E. is held against a grid device or septum by the movement of water. The grid is covered with a cloth like material and the D.E. forms a "cake" or coating on the cloth. Water passes through the D.E. with the suspended material trapped in the channels of the skeletal material. / D.E. is considered to be a disposable filter media. When the pressure reaches 10psi (70 kPa or 1 bar) above the normal cycling starting pressure, the filter must be cleaned. In most cases it would need a backwash, but we manually clean our filters every 3 months / 4 times a year during the filter operation. We charge $78.00 for Cartridge and $99.00 for D.E. filters. 469-400-4404


Celina Pool Service

BobcatBLUE Pool Cleaning Service
Celina, Texas 75009

469-400-4404


www.bobcatblue.com

Wednesday, March 4, 2015

TOTAL ALKALINITY / CELINA POOL CLEANING SERVICE 75009

WWW.BOBCATBLUE.COM

Total Alkalinity
Chlorine efficiency is affected by pH. The change in pH is governed by total alkalinity. Maintaining proper total alkalinity is therefore important for proper disinfection control. It is also important for maintaining water balance. If the pH is not at the correct reading you must fix the alkalinity first. 

Calcium Hardness
Adding hose water, evaporation and the addition of pool chemicals cause the calcium concentration to increase. Heavy rainfall, system leakage and source water low in calcium hardness result in a decrease of calcium concentration. Calcium hardness should be tested at least once a month. (200-400ppm) and 300ppm is the ideal range for your calcium hardness. (www.bobcatblue.com) / click "chemical" to see the complete ideal chemical chart for ideal ranges.

Cyanuric Acid (CYA)
Cyanuric acid is increased by manual addition or by the use of stabilized chlorine. CYA is decreased by dilution. If a form of stabilized chlorine is used, CYA should be tested weekly.

Other Testing
Testing for nitrates, phosphates, metals and TDS should be performed on an as-needed basis. Testing monthly will in most cases be sufficient to spot any developing trends, allowing the pool operator time to respond accordingly. Testing for salt concentration, hydrogen peroxide and potassium monopersulfate should be performed according to existing conditions. (for more information visit www.bobcatblue.com)


469-400-4404