I'm not sure about a pool, but with a hot tub, backwashing refers to reversing the flow of water through the filter so as to flush the filter of the sediment it has collected. There should be a valve on the inlet side of the filter that diverts (reverses) the flow of water. Assuming your filter is working properly, you should rarely have to drain and refill the pool. Hope that helps. Call a pool service to have them do a show and tell about your pool. The one time charge will be well worth it. Take a lot of notes because you will never remember all the advice.
It just stays there. some is lost to the backwash , splashing, overflow and so on but the salt that is in the water stays there.
Just backwash until it is at the level you would like it to be. Or get a floating swimming pool skimmer ond take advantage of the free water and save on pool salt if you have a saltwater chlorinator.
Backwash's, pool overflowing as a result of rain or overfilling, water being splashed over the side. swimmers taking out water on their body's as they get out of the pool and my dog drinking the pool water.
There wont be any dirt under the sand. When you vacuum your pool you should do it on filter mode Otherwise you will lose a lot of water for nothing, this would be especially wasteful in the case of a salt water pool. Ofter having vacuumed the pool on filter mode and if the pressure gets too high backwash. after backwash rinse for a minute, then return to filter.
It should not do any harm as long as you don't have a saltwater pool and if it is a salt-water pool that you are using a non-toxic salt like magnesium and potassium chloride rather then the usual Sodium chloride.
When adding stabilizer to a pool you should not have a backwash valve open. Stabilizer should be added directly into the skimmer basket and you should open the skimmer all the way and close off the main drains for 24 hours.
how do i calculate the volumn of backwash in a pool
29 gallons
There are two types of saltwater poolsThe sodium chloride pool that is Common salt. the cheapest and most popular salt water pool system. they do away with the need for keeping chlorine on the premises, but one still has to be careful about pH and algae control the pool is required to run for a fairly long time to generate enough chlorine. and the salt used is not good for the soil around the pool. in fact the backwash needs to be disposed of to waste.The Magnesium and potassium chloride pool, A lot more expensive but well worth it. these salts are in fact good for the swimmer and for the garden so there is no need to waste backwash water. from what I have seen of the new system in my pool it does not need to run for as long and for the first time ever I have not added any thing to the water in the pool for the last 6 month's.
Add salt
Backwash first then shock. If you shock and then backwash you will be throwing away the shock you just put.
Yes as a mater of fact that is what salt water pool normally is. With a salt water pool there is a electronic salt water chlorinator installed that uses the salt in the water to create chlorine. However if you don't have a salt water chlorinator and prefer the feeling of a salt water pool then there is no reason not to add salt to the pool as well as keeping up the chlorine yourself.