Swimming Pools

Yes, after backwashing a pool filter you should add diatomaceous earth (DE) back to the filter immediately if you have a DE filter. If you have a sand or cartridge filter, there is no need to add anything after backwashing.

Insurance companies seem to think it's likely, but that's not saying a whole lot. I swim in an indoor pool that is in the LOWER level of an athletic center, and when the front desk hears thunder . . . out we go for 30 minutes! Stupid.

I have done extensive research on the web to find an answer to the question of getting hit by lightning while swimming. In more than 450 cases I have looked at I have found only two in which one person, who was among others swimming in the ocean, was struck by lightning, and the other was a scuba diver, and the lightning actually struck his tank while he was coming out of the water. The first guy was surfing, so you might even say he was not technically in the water, but on it (perhaps making him more of a target?).

I have also found that while people do not seem to be struck by lightning in the water, many, many are struck just after getting out of the water to take shelter. I've yet to find one in which people are struck by lightning in a swimming pool--recently or any time in the "ignorant" past when people "didn't know better" to get out of the water when thunder was heard.

The whole idea of a pool-full of people being killed or electrocuted from a single strike in the water is ridiculous. I know it sounds right, though, since water is a good conductor of electricity. I have even read some pretty stupid remarks by "experts" that claim when lightning hits the water it disperses throughout the entire body of water. But this is simply not true, and research shows it not to be the case (hey, where are the thousands of dead fish that should wash up on shore after a stormy afternoon at the beach?). No "expert" can actually tell the truth about this because it is "conventional knowledge" that you are not to be in the water when thunder is heard--and insurance companies wouldn't like it.

How about this one: I found one story in which a man was killed by a lightning strike while sitting in his boat (a common place for people to get struck) while his two friends, who were swimming next to the boat, looked on, completely unharmed!

Most people who are struck were hit while standing out in the open, wet with rain, not under cover. And what happens when you get out of a pool? Hmmm, suddenly you are a lightning target standing in the open!

I've found many stories of people getting struck on a clear day, in their homes, in cars, laying on the ground, under trees, standing next to swimming pools--in short, all the places you are advised to go to take shelter. And only two of people being struck in the water (ocean, to be specific). There are probably more out there, but good luck trying to find them.

Perhaps, if proper research was conducted, it might actually turn out that we should all be diving into water when we hear thunder!

watt denotes the measure of energy consumes per unit time( 1 second). As

1 hp=.746KW

so in 24 hours 0.746 KW will be consumed constantly.

Using too many extension cords can lead to a drop in voltage, causing the pool pump to work less efficiently. This reduction in voltage can reduce the pressure at which the pump operates and may lead to potential damage or overheating of the pump motor. It is best to minimize the use of extension cords and ensure that they are of adequate length and gauge for the equipment being powered.

For this size pool, about 4,862.3 gallons.

Swimming during a lightning storm in an indoor pool is generally considered safe because indoor pools are grounded and protected from lightning strikes. However, it's always best to err on the side of caution and avoid swimming during a storm to minimize any potential risks.

You will need to add an amount of chemicals that is proportional to the size of your pool. The containers of the chemicals should tell you how much to add for the size of pool you have. It might be better if you take a sample of water to a local pool supply store, so that they can tell you exactly what you need for your specific pool. http://www.ehow.com/about_5390392_chemicals-put-new-pool.html

Liters or cubic meters are typically used to measure the volume of water in a swimming pool.

Adding food coloring to water will not affect the water's rate of evaporation. The food coloring simply changes the color of the water but does not alter the basic properties of the water molecules that determine its evaporation rate.

When diving to the bottom of a deep pool, the increase in water pressure compresses the air inside the middle ear. This pressure differential can cause discomfort or pain due to the unequal pressure on both sides of the eardrum. Techniques such as equalizing pressure through methods like swallowing, yawning, or pinching the nose and blowing gently can help alleviate this discomfort.

Specific heat is the amount of heat energy required to raise the temperature of a substance by 1 degree Celsius. The swimming pool would have the highest specific heat because it can absorb more heat energy compared to grass or a parking lot due to its larger mass and ability to retain heat.

To lower the pH from 9.2 to 7.2, the worker should add an acid, such as muriatic acid or pH decreaser, to the pool water. She should follow the manufacturer's instructions on the product to gradually lower the pH level, frequently testing the water until it reaches the desired pH of 7.2.

Because each different type of chlorine will effect your pH differently. Each type of chlorine also leaves behind different ingredient residuals. For example.. Liquid chlorine leaves behind some salt, tablets leave behind chlorine stabilizer, some shock bags leave behind calcium and other shock bags leave behind chlorine stabilizer. There are many other types... Also, do not ever mix them together. The results could be chemically life threatening and explosive. Bottom line....read the label and really know what you are buying.

Aquaticpoolsystems.com

If the time it takes to drain the pool varies inversely with the power of the pump, it means that as the power of the pump increases, the time it takes to drain the pool decreases. Therefore, John should use the pump with the higher power to drain the pool in the shortest amount of time.

It's best to remove the snow and ice from the pool cover to prevent damage and ensure proper functioning. Use a broom or soft snow rake to gently push off the snow. Avoid using sharp tools or excessive force to prevent tearing the cover. If the ice is too difficult to remove, applying a de-icer or warm water can help melt it.

To lower pH in a 6800-gallon pool with an alkalinity of 350 ppm, you would typically use pH minus according to the product's instructions. The amount needed can vary based on the product concentration and pool conditions, so it's best to follow the manufacturer's guidelines for dosage. It's important to test the pH after adding the pH minus and make adjustments as needed to reach the desired range of 7.2-7.6.

It is generally recommended to wait at least 24 hours after adding a pool clarifier before adding other chemicals to allow the clarifier to work effectively. This will ensure that the clarifier has sufficient time to settle and improve water clarity before introducing additional chemicals.

Because each different type of chlorine will effect your pH differently. Each type of chlorine also leaves behind different ingredient residuals. For example.. Liquid chlorine leaves behind some salt, tablets leave behind chlorine stabilizer, some shock bags leave behind calcium and other shock bags leave behind chlorine stabilizer. There are many other types... Also, do not ever mix them together. The results could be chemically life threatening and explosive. Bottom line....read the label and really know what you are buying.

Aquaticpoolsystems.com

The average temperature of a pool in South Florida without a heater is typically around 70-80 degrees Fahrenheit during the winter months and can reach up to the mid to high 80s during the summer months. The temperature may vary depending on the specific location and weather conditions.

Personally, short, well rooted grass is what I think is best. It is out of the way and durable enough to allow for people to walk on it often and comfortably. Well rooted so that it will not uproot and end up in your pool. As far as other plants, just make sure you have enough space between them and your pool to avoid leaves and/or petals in your pool, as they can be annoying to remove.

When chlorine is added to pool water, it reacts with organic matter, oils, and bacteria in the water to form new compounds, such as chloramines. These chloramines produce the distinctive "chlorine smell" commonly associated with pools, rather than the chlorine itself. The stronger the smell, the more chloramines are present, which indicates that the pool may need additional chlorine to break down these compounds.

If the combined chlorine in a swimming pool is a negative number, it indicates a testing error or miscalculation. It's important to retest the water using a reliable pool water testing kit to get an accurate reading. Negative combined chlorine levels are not physically possible in a swimming pool.

Sarah's total displacement can be found using the Pythagorean theorem. The horizontal displacement is 20 yards east, and the vertical displacement is 50 yards north minus 50 yards south, which equals 0. This means her total displacement is the square root of (20^2 + 0^2) = 20 yards.

To raise the chlorine level in your pool after using copper sulfate, you can add chlorine shock or liquid chlorine. Follow the manufacturer's instructions for dosing based on your pool's size and current chlorine levels. It's also important to test the water regularly to ensure the chlorine level is maintained within the recommended range.