From the pool
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.
You can backwash certain types of filters. You force water backwars through filter to release particles trapped by filter in its normal forward flow of water.
shock pool its the only way to kill everything in water
Because dirt and small sand will pass through the filter the first time it is run after backwashing. By rinsing you are sending that debris, which could cloud your pool, out of the backwash port instead of back into the pool.
Low pool filter pressure after backwashing typically indicates that the filter has effectively removed debris and contaminants, leading to a clear flow of water. This drop in pressure can also occur if the filter media is clean, reducing resistance to water flow. Additionally, if there are leaks in the system or if the pump is not operating at full capacity, it can contribute to lower pressure readings. Regular monitoring and maintenance are essential to ensure optimal filter performance.
Bypass to pool on a sand filter is used primarily during maintenance or when backwashing the filter. This allows water to flow directly to the pool while the filter is offline, preventing any disruption in pool circulation. It can also be utilized if the filter becomes clogged or when the pool is being drained and refilled, ensuring continuous water flow and clarity. Always ensure the system is properly configured to avoid any issues with water quality.
48 square feet will give you more than enough and reduce backwashing frequency.
If you are backwashing more than you care to,or your filter pressue is high, or you put your hand against the outlet where the clean water is returning back to the pool and your hand does not get pushed away any of these reasons would be a reason to change the sand, depending on the size of the filter some filters need to be changed once a season every other season or not for years, bottom line you should only be backwashing after vacumning the pool. if your water in your pool is clean or clear I would say the sand is ok.
Let me say, I have never had a problem with any treated water coming from a pool that went onto the grass or sprayed on the trees or flowers. In fact, the lawn was greener and grew faster where the water was discharged from the pool after heavy rain to lower the water level or backwashing the filter to keep the pool water clean.
It is recommended to add about 1-2 cups of Diatomaceous Earth (DE) per 10 square feet of filter area after backwashing your pool filter. Be sure to follow the specific instructions for your filter model and size when adding DE after backwashing.
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.
No you only backwash your pool when your filter pressure on your filter is high 30psi and above on most pools. If you backwash your pool be sure to add two scoops of de to your skimmer. If the presure is still high the u need to clean the filter