First test and post

[dsgerman]

Glad to find trouble free pool. 18 years with vinyl liner. Minimal issues until this years. Heavy algae. Shock with 8-10gallons liquid shockx2. Very cloudy. Slowly clearing 27500 gal over 2 weeks. Pressures steady at 17psi. Backwash sand filter multiple times. Finically realize need to SLAM.
CYA 40
FC 8(even a week after last shock)
CC 2
TC10
CH 300
TA 150
PH 7.7(I had hard time reading)

Adding 457oz Chlorine and 31 oz muriatic acid
Will test in morning, robotic cleaner, brush.
Anything else I should do. Thanks

 

[PoolStored]

You should follow this process. Link-->SLAM Process

Which you are not doing. You should lower your pH first. Wait about 30 minutes and confirm pH. Then raise your FC to slam level for your CYA, which should be 16. You are at 8. If you add 457oz, you are adding 16 to the 8, which will end up at 24. You only want to add 8ppm

 

[dsgerman]

Thanks
Sorry. Needed to list in order.
I first added muriatic acid
Realized pool math was quoting for 6% bleach. Changed to 10% chlorine. Added 3 gallons. I know more than needed just finished the bottle.

 

[dsgerman]

First am
FC 26
CC 1
No change in cloudy pool or pressure holding at 17. Pump. 3000 rpm 24/7.

 

[PoolStored]

Do you have a VSP? Run at a lower rpm, like 1400-1700, the filter filters better at lower speeds...

 

[dsgerman]

Thanks. Yes I do. Will change after work. Run higher speed due to differential pressures at skimmers and a humming flow noise in heater when on.

 

[PoolStored]

Thanks. Yes I do. Will change after work. Run higher speed due to differential pressures at skimmers and a humming flow noise in heater when on.

For slam, the differential pressure doesn't matter...the heater does need the flow. You might turn heater off while you slam to run at slower speed. You can run 3000, slam will go faster at lower speed. Do what you can!

 

[dsgerman]

I also have performed 2 cleanings of sand filter with in the swim sand filter cleaner. Should I add some DE to also help with filtering. My pressure is rock stable. Only goes up to 20 when VS motor starts up at 3200 rpm then back to 17. Pressure gauge new last week.

 

[PoolStored]

Should I add some DE to also help with filtering.

Would not hurt. ONLY use pool DE.

Add DE to a Sand Filter

A clean pool filter will increase the efficiency of your pool! ... your filter are to backwash it, clean the manifolds and grids, and add new DE.

www.troublefreepool.com

 

[dsgerman]

Would not hurt. ONLY use pool DE.

Add DE to a Sand Filter

A clean pool filter will increase the efficiency of your pool! ... your filter are to backwash it, clean the manifolds and grids, and add new DE.

www.troublefreepool.com

Afternoon
FC 21
CC 1.5
Pump 1700
Looked clearer than cloudier at lower speed?
Will do OCLT later tonight
Thanks

 

[dsgerman]

Afternoon
FC 21
CC 1.5
Pump 1700
Looked clearer than cloudier at lower speed?
Will do OCLT later tonight
Thanks

Evening 10 pm
Revised CYA 50(repeat test, 2nd time better)
New SLAM FC20
FC 16
CC 0.5
Add141oz 10% chlorine.

 

[dsgerman]

Afternoon
FC 21
CC 1.5
Pump 1700
Looked clearer than cloudier at lower speed?
Will do OCLT later tonight
Thanks

Late last night
FC 16
CC 0.5
Added 141 oz 10% chlorine
AM
FC 19
CC 1
Added 35 oz chlorine
Added DE increase 1psi, no increase in pressure
Brush and robotic pool cleaner
Backwash still dirty
No change in deep end
Any help appreciated. This is day 2 of SLAM.
Deep clean sand filter?
Patience?

 

[PoolStored]

Take a few of these...the pool will clear...

CapturePOP.JPG

• PoolStored
• Jun 12, 2023

 

[dsgerman]

lol will do!

 

[dsgerman]

lol will do!
View attachment 574184

Last evening
FC 16
CC 0.5
Added 141 oz 10% chlorine.
This AM
FC 20.5
CC 0.5
Doesn’t appear to be losing chlorine overnight
Stil working on clearing cloudy pool with DE
Thanks.

 

[PoolStored]

Do this test tonight...Link-->Overnight Chlorine Loss Test

 

[dsgerman]

OCLT
PM
FC 19.5
CC 0.5
CYA 40

AM
FC 20
CC 0.5
Pool clearer. See hint of mail drain!!!!
193oz chlorine added about 3 hours before PM reading. SWG off. Thanks.

 

[PoolStored]

Within the margin of error for the test. You passed OCLT.

Do not stop slam until you pool looks like this link-->How Clear is TFP Clear?

Keep scrubbing and cleaning the filter!

 

[dsgerman]

thanks. Good feeling to see even a blurry main drain. Lots of backwashing with DE. Did not raise psi more than 20% even after several hours. Considering cleaning sand like in the video. Channeling? Brushing and robot stirs things up all day. Dead algae and dirt. Thanks for sticking with me!!!!!

 

[PoolStored]

PSI monitoring should be done at high speed. You will not see a PSI change if you are running low speed. I check mine at 3000RPM.

Deep clean is rarely needed. Sand just takes longer. If it is improving, then you are likely ok.

What filter do you have? Have you added any pool store products we don't recommend?