1st opening, SLAM?

EdPepp

Member
Apr 29, 2018
13
East Islip, NY
Is a SLAM required when opening the pool?
I see that it is required if CC is above 0.5 or FC is zero.
Is there usually chlorine left in the pool after having it covered all winter? The pool installer closed the pool in October, they threw some shock in and pulled the cover over.
 

zea3

Mod Squad
TFP Expert
LifeTime Supporter
Jul 10, 2009
11,720
Houston, Texas
If your pool is clear with no visible algae then just balance the pool and you are good to go. If your FC is 0 at opening but you have clear water I would raise it to the top of the FC level for your pool and run an Overnight Chlorine Loss Test. If you pass the test you do not need to slam.
 

EdPepp

Member
Apr 29, 2018
13
East Islip, NY
Opened it up today and was surprised how clear the water was. I did notice some white substance along the walls and floor. I guess it sorta looked like the dust/powder that was in the pool in the fall after the pavers were done. I spent a week cleaning and the pool was crystal clear before the cover went on.
Turning the filter on today sort of spread the substance and the pool went from clear to cloudy.
I threw the robot in to start cleaning and noticed some white flakey stuff floating throughout the pool as well.
My test results are:
FC .5
CC .5
TA 130
pH >8.2 ?
CH 125
Temp is 62

Where do I go from here?
 

zea3

Mod Squad
TFP Expert
LifeTime Supporter
Jul 10, 2009
11,720
Houston, Texas
Do you have a result for your current CYA level? Use Poolmath to determine how much muriatic acid you need to lower the pH. You may need to lower it a couple of times, since it could be higher than 8.2 Bump the chlorine up to 10ppm and run the Overnight Chlorine Loss Test to see if you need to SLAM Process the pool.
 

EdPepp

Member
Apr 29, 2018
13
East Islip, NY
OCLT passed, water has cleared up this morning, kept the pump running overnight. SWG is not connected yet.

Added muriatic acid last night, dropped pH to 7.8, TA dropped to 110.
Next steps,
Bring CYA to 70 and and correct TA and pH, connect SWG?
 

zea3

Mod Squad
TFP Expert
LifeTime Supporter
Jul 10, 2009
11,720
Houston, Texas
OCLT passed, water has cleared up this morning, kept the pump running overnight. SWG is not connected yet.

Added muriatic acid last night, dropped pH to 7.8, TA dropped to 110.
Next steps,
Bring CYA to 70 and and correct TA and pH, connect SWG?
Yes. Keep an eye on your pH for a couple of days. If it drifts up in the 8's right away you may want to shoot for a lower pH target. You only need to adjust TA if your pH is unstable. Do you know your salt level?