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 has a TDS factor. Thus a rise in TDS.
Example: Fill a quart container with water at 900ppm TDS. Evaporate 1/2 of that water from the container. You now have 1/2 quart of water with the TDS factor of 1800ppm. Fill the container back to its original level with Distilled water (0 TDS), and you will have your original quart of water at 900ppm TDS. The water that is being used to replenish pools is not 0 TDS, but may have a TDS factor as high as 900ppm.
Perform the same experiment as before. This time, fill the container to its original level with water having 900ppm TDS. You now have 1 quart of water with a TDS factor of 1350ppm. This is what happens in your swimming pool.
In addition to this, everything that enters the body of water; dirt, leaves, chemicals, bodies, ect....ect. EVERYTHING has a TDS factor, which contributes to the overall rise of TDS in that body of water. In some regions, i.e.: coastal California, climate is not the main reason for a rise in TDS, rather chemicals being used. Calcium hardness, for example, is the main contributing factor in these regions due to use of Calcium and Sodium Hypochlorite.
When the TDS level of pool water rises, subtle problems will begin to occur: calcium deposits on pool at water line, brown manganese stains, salty taste to water, irritation to skin and eyes, 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 not be allowed to rise to these levels. The solution, given by the pool industry at this time would be to drain and acid wash the pool and bead blast the tile. This practice of acid washing a pool is destructive and unnecessary.
Using the AQUAZERVE will result in a healthy body of water thereby allowing greater efficiency of all chemicals used. Staining can now be controlled with any number of products available, eliminating the need for acid washing.
Since using AquaZerve our flower beds and plants are maintained year round by our pool. We even use it for our bird bath.
Bill & Charlene Webb, Lake Havasu City, AZ .
