First Summer With Our Pool - First SLAM

[l1ltaral1l]

I am going to start SLAMing tonight or tomorrow morning after our guests leave. We found a spot of algae in the corner of our pool and have been having some FC issues over the past few weeks (which makes sense). We've had a lot of hard swimming here each week since summer started,and I let my FC get down to nothing which started this (I think). Just wanted to get this thread started as I know I'll have questions. My two main go to links are below.

SLAM - Shock Level and Maintain

We’ve all had to deal with a green pool. Clear algae from your pool with a SLAM! Read here to use shock level and maintain to clear your pool.

www.troublefreepool.com

The Free Chlorine and Cyanuric Acid Relationship

Managing your cyanuric acid and Free Chlorine levels is key to stabilizing your pool. Learn how these two items affect each other.

www.troublefreepool.com

 

[Katodude]

I understand about waiting for guest to leave before starting the SLAM. You might want to consider raising the FC to 20% of CYA in the meantime so the situation does not get worse. Might make the SLAM go faster.

 

[Msch99]

Even with a SWG, I try to add about 2ppm of liquid chlorine either 30 minutes before or just after a large swim load to assist.
The sooner the better to start the slam.

 

[l1ltaral1l]

Starting now! Stay tuned for more questions. lol

 

[l1ltaral1l]

3 gal of 12.5 LC just added. I wanted 4 and swore I had 4, but apparently I only had 3. So off to get more tomorrow.

Pump is on 24/7 and the SWCG is off.

 

[l1ltaral1l]

FC this morning: 19

Pool store opens at 10, but at least we're off and running overnight!

 

[l1ltaral1l]

I’m ready! Lol

 

[JJ_Tex]

Easy on the brakes and no sharp turns

 

[Mdragger88]

Slam on!

 

[l1ltaral1l]

So. I haven't reached my rec SLAM level yet. FC has been up, but not at the level it should be. But last night I did the OCLT. It was 1ppm. I have no CC's and a visually clear pool. Should I continue to add LC until I get to SLAM level? Or consider it complete for now?

 

[Katodude]

My experience says and extra day or two of SLAM does not hurt and can only help. Keep brushing, you want to make sure that everything is completely dead.

 

[l1ltaral1l]

Oh yes, I forgot. I pulled out the good ol' brush and have been brushing also (in addition to Fred the robot, lol).

Ok, better safe than sorry. I'll go add another gal this morning and keep it moving!

 

[wireform]

So that you know elevated FC level doesn't equal slam. If slam is what you need the OCLT is meaningless do to the 3 criteria which was the cause you wanted to slam. Knowing you had an area of concern and not bringing water to slam level won't eradicate it. It'll be back again or I should say keep growing possibly.

 

[l1ltaral1l]

... the OCLT is meaningless do to the 3 criteria which was the cause you wanted to slam...

Ahhhh, thank you for this! I did not realize this.

 

[l1ltaral1l]

Holy crud. Is it normal to lose 8ppm FC in 8 hours? This morning at 9:20am, FC was 21. Now, at 5pm, it was 13.5. Today was our swim lesson day, so the pool was in use all day. But wow. I didn't think it would drop that much!

 

[Mdragger88]

It happens when u have real high fc & loads of sun The real barometer is the overnight loss. Do your best to test and add lc several times during the day to maintain the level. Every hour not @ slam level is an hour algae wins.