added de to sand

ssmith1092

Active member
Aug 19, 2017
32
dover, delaware
so trying to get a little more filtration before i go but a duda bag. si i follow the directions here on adding de to sand fikter for a 1 psi raise. well 8 add 1/4 cup of de total and it eaised my filter pressure from 14.5 to 15.5. i then waited 24 hours and its still at 15.5 i even sweeped the pool to see if it would catch some of yhe dirt that was on thr bottom and its still at 15.5. the article said it will take atleadt a cups of de for a 1 psi raise. is this nornal for a 1/4 cup
 

tim5055

Mod Squad
TFP Expert
LifeTime Supporter
May 11, 2014
10,268
Franklin, NC
Every filter s different, that is why there is no blanket statement to add X amount. If you got the 1 PSI rise you are good to go.

Now, give it time. If you have a manual vacuum, use it. Keep sweeping stuff to get it up in the water column. Obviously the DE can't do it's thing if the dirt is on the bottom of the pool and .
 

ssmith1092

Active member
Aug 19, 2017
32
dover, delaware
well i decided to vacuum. starting pressure was 15.5 after vacuuming, pressure rose to 20psi. so i backwashed, and rinsed. pressure came back down to 14.5 and i added a 1/4 cup of de and it rose back to 15 psi. but now my pool is cloudy from the dirt that got past the filter. how do i clear it up faster rather then waiting a few days. pump only runs 6 hours a day total
 

ssmith1092

Active member
Aug 19, 2017
32
dover, delaware
hey guy. so after adding de to the sand filter, and even adding a duda bag to on of the outlets, i have notice less floats over the pool light at night but im still getting a fine layer of dirt on the pool bottom. i tried to vacuum it and it still comes thru the duda filter. sweeping it just turn the pool cloudy green/brown until it all settles to the bottom again. only way to keep it clear is to vacuum its, but i go thru to much water vacuum it.
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,052
San Dimas, CA (LA County)
hey guy. so after adding de to the sand filter, and even adding a duda bag to on of the outlets, i have notice less floats over the pool light at night but im still getting a fine layer of dirt on the pool bottom. i tried to vacuum it and it still comes thru the duda filter. sweeping it just turn the pool cloudy green/brown until it all settles to the bottom again. only way to keep it clear is to vacuum its, but i go thru to much water vacuum it.
I wonder if that's dirt that's escaped or fresh algae gathering every night. Try an Overnight Chlorine Loss Test and post some test results.
 

ssmith1092

Active member
Aug 19, 2017
32
dover, delaware
yes i am rinsing the filter after backwashing. and i will trt to get an overnight test. bad part is i work over night. so by tge time i get home the sun is up
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,052
San Dimas, CA (LA County)
soo i have passedbthe chlorine test. no lost chlorine. what should i do next.
So it's not algae, its dirt. Rereading things, it sounds like if you vacuum to waste, it goes away, but if you just vacuum to filter, it comes back. The next thing is to open up the filter and look for cracks or missing O-rings.
 

ssmith1092

Active member
Aug 19, 2017
32
dover, delaware
where should i be looking for crack aor missing o rings at. the multiport valve? its crazy because the pool will be prefectly clear. but it will be fine dirt all over the bottom. if i sweep it. the pool will cloud up for a few day until all the dirt settles back at the bottom of the pool. for this reason the pool only gets used after a vacuum which is about once or twice a week. but its turning into a lot of wasted water and chemicals and salt.
 

ssmith1092

Active member
Aug 19, 2017
32
dover, delaware
also i just added some cya in thru the skimmer very slowly and sure enough i saw it getting past the filter and out one of the jets into the pool. filter was deep cleaned at beginning of the season.
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,052
San Dimas, CA (LA County)
where should i be looking for crack aor missing o rings at. the multiport valve? its crazy because the pool will be prefectly clear. but it will be fine dirt all over the bottom. if i sweep it. the pool will cloud up for a few day until all the dirt settles back at the bottom of the pool. for this reason the pool only gets used after a vacuum which is about once or twice a week. but its turning into a lot of wasted water and chemicals and salt.
Anywhere inside. Dirty water is crossing the threshold to the clean side without getting scrubbed by passing through the sand bed. So it's in the multiport, or the seal between the multiport and the standpipe, the standpipe itself, any one of the laterals, or the sand itself. It could be as simple as the sand is hardened up into sandstone from using clarifiers or flocs (even some multi-purpose pucks sneak it in - and when you backwashed, you disturbed things and broke it up into clods with big gaps between them. It only takes one gap to get what you describe. Or one lateral that cracked between slits.