Let’s see your water after removing winter cover!! **RESURRECTED FOR 2025!**

[rdelisa]

Mine was clear, but had al algae ring around it. The FC was just 1.5PPM. I went a little bit overboard wanting to avoid an Algae bloom and SLAMMED it with 3 x 121oz jugs of 7.5% chlorine and 2 x 1lb bags of 58% Cal-Hypo.
After overnight the FC is now 33PPM. The PH is sky high at about 8.5.. That's okay. It'll take a couple of weeks anyway to get it vacuumed and temp up to swimming levels. The water is about 57 degrees.

 

[Mdragger88]

Mine was clear, but had al algae ring around it. The FC was just 1.5PPM. I went a little bit overboard wanting to avoid an Algae bloom and SLAMMED it with 3 x 121oz jugs of 7.5% chlorine and 2 x 1lb bags of 58% Cal-Hypo.
After overnight the FC is now 33PPM. The PH is sky high at about 8.5.. That's okay. It'll take a couple of weeks anyway to get it vacuumed and temp up to swimming levels. The water is about 57 degrees.

Is your cya above 80? If not it sounds like a bombing not a Slam. Not more effective just more risky and more expensive. Just trying to clarify for other readers that this is not recommended.
* The phenol red Ph test is inaccurate at fc levels above 10ppm so do not adjust until fc comes down.

 

[JRzMom]

With the cover off the daily UV demand is back. The sun isn't super high in the sky yet but it's enough that you'll have 70s Monday and Tuesday.

Either put the cover back on or use a submersible pump to disperse chlorine as needed.

I put the cover back on. I got the filter running today and added a bit of chlorine. I'll test later today and keep the winter cover on until I am ready to swim. The water temperature is 55 degrees F. It still needs a good vacuuming and scrubbing, but thanks to TFP, I'm feeling pretty confident this year!

 

[rdelisa]

Is your cya above 80? If not it sounds like a bombing not a Slam. Not more effective just more risky and more expensive. Just trying to clarify for other readers that this is not recommended.
* The phenol red Ph test is inaccurate at fc levels above 10ppm so do not adjust until fc comes down.

Thank you. I wondered about the accuracy of the PH. However, my tap water's PH has been extremely high lately, so it's not all that surprising. Pool is looking great, but now I'm dealing with stains.

 

[rdelisa]

Is your cya above 80? If not it sounds like a bombing not a Slam. Not more effective just more risky and more expensive. Just trying to clarify for other readers that this is not recommended.
* The phenol red Ph test is inaccurate at fc levels above 10ppm so do not adjust until fc comes down.

Yes, I overestimated the Liquid Chlorine requirement, but not by that much. According to the TFP SLAM Chart, at 60PPM CYA 24PPM should have been sufficient. Overnight that 33PPM was down to 19PPM. The next night was 17PPM. However, pool is crystal clear. I think I'll keep it around 20PPM for now until I only lose 1PPM overnight as recommended. The CYA has dropped to around 55PPM after vacuuming, cleaning and topping off the water.

 

[Newdude]

According to the TFP SLAM Chart,

Disregard the chart if you aren't following the process. The #s don't apply to other methods. They are designed to be sustained and touching them here or there, or going totally rogue with your own plan is not the process.


SLAM Process

 

[Sunny Blues]

Came to post amazing picture after removing our cover today. This is what it looked like underneath immediately after taking the cover off. Minds blown once again, as this is what it is like every year! We live in northern Illinois and closed our pool in October. So almost 6-7 months under a cover and look what beautiful water awaited us!! I love TFPC!