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Just because your pool is green it does not mean you have to drain your pool! So why drain your pool?
One simple reason, because of an excessive accumulation of Total Dissolved Solids (TDS) in the water. In the summertime, temperatures reach 100-120 degrees. Combined with low humidity and windy conditions the evaporation rate in your swimming pool is greatly excelled. When water evaporates, only H2O dissipates. The TDS remains in that body of water. The pool water is continuously replenished with fresh water supply through the automatic water fill. The water coming into the pool contains Total Disolved Solids, thus a rise in TDS level.
Example: Fill a gallon container with water at 500ppm TDS. If you evaporate 1/2 of that water from the container you would now have 1/2 gallon of water with the TDS of 1000ppm. Fill the container back to its original level with water that contains zero TDS, and you will have your original gallon of water at 500ppm TDS. The water that is being used to replenish pools is NOT 0 TDS, but may have a TDS factor as high as 900ppm.
In addition to this, everything that enters the body of water; dirt, leaves, chemicals, bodies, etc....etc. EVERYTHING has a TDS factor, which contributes to the overall rise of TDS in that body of water.
When the TDS level of pool water rises, many problems may begin to occur: calcium deposits on pool, and water line, brown manganese stains, salty taste to water, irritation to skin and eyes, proper free chlorine levels difficult to maintain, algae blooms, green tint in water, etc.. As the TDS rises higher and higher, these problems amplify to a point where the pool will begin to deteriorate.
At high levels of TDS, calcium will begin to replace the plaster in gunite pools. This will expose itself as a dime sized circle on the plaster. At this point the calcium deposits at the water line will have grown to resemble a stalactite and manganese stains may be very evident.
Obviously the TDS should never be allowed to rise to these levels before taking action, but if they are rising the solution at this time would be to drain the pool and either acid wash or pools can also be bleach washed, or given a chlorine bath if the plaster is very thin. Bead blasting would be used to remove the calcium on the water line from tile, pebble or rock.
What about if the pool is green and the Total Disolved Solids is not an issue?
If your pool is lightly green, or turning green due to equipment failure, lack of chemicals, lack of circulation, filter needing service, etc.. And you can still see the bottom, the first thing you must do is fix the problem causing the pool to turn green!
Then the green pool can be chemically treated with the proper chemicals!
To have someone come out and see which option is necessary for your pool, fill out the form below or give us a call right now! (480) 474-4730
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