Pool temp and SLAM

[JenF75]

We’re in the process of opening our pool, but it’s really not swimming weather yet. I’m planning on doing a SLAM, but hoping not to heat the pool until the weather warms up a bit. Is there a minimum water temperature for SLAMing? Our pool temp is sitting around 55 degrees right now.

 

[needsajet]

55 is plenty for a SLAM. That's around the temp that plant life gets fairly active. It will work even lower, but takes longer. Main thing is brushing to disturb any algae that has protected itself with biofilm.

 

[JenF75]

I'm now questioning if I really need to SLAM.

Pool opening testing (I haven't added anything to the water yet)
FC 8
CC 0
pH 8.0
TA 100
CYA 50
CH 325

I know I have to lower the pH a bit and I'll also try and bring the CYA up to between 70-80, but is there really anything else I need to do? I hate SLAM'ing (it's tedious), so I'm thinking if it's not necassary, why do it? But on the other hand, I have time because no one will be swimming for at least another week, so if it's best to do one on opening, I will. Thoughts?

 

[needsajet]

I wouldn't SLAM unless it's necessary, I agree.

The best way to know for sure by doing this easy test: Overnight Chlorine Loss Test

I would also do it if I could see any green, or if the water seemed cloudy after a few days of filtration.

 

[wireform]

I would also recommend for the testing water to be at room temperature for accuracy.

 

[JenF75]

Thanks for your input everyone. The water is crystal clear and now that it's about 74 degrees, the numbers still look great. I'll do the OCLT and cross my fingers that I pass that and can skip the SLAM.