Got TF100 kit this afternoon--too late to start SLAM?

[ActivFam]

UPDATE IN POST #22
It's 3:30 here, 1/2 pool is in sun, is it too late to do initial test and start SLAM? I have all weekend to work on this. Sick of looking at cloudy pool.

 

[MannyT]

I would start now.

 

[Richard320]

Not at all. You can get 2 or maybe even 3 additional tests and replenishments in before bed. A huge kill. And then it will have all night long to work on what's left without the sun stealing any.

 

[RonsPlc]

The sooner you get started, the better it will be!

 

[borjis]

evening /night time is the best time for a SLAM dose for sure.

 

[ActivFam]

Re: Got TF100 kit this afternoon--too late to start SLAM? **updated with initial

Just took my first test readings with TF100

FC 8
CC 0.5
CYA 90 (my husband thought maybe 80) repeated several times in different areas

didn't complete ALK or ph because I figured I was going to get "drain the pool x%" before SLAMing, (I already drained over 27 inches this past week and refilled, I wonder how high my CYA level truly was!!!)

I also used a strip test just to see about stabilizer and it was in the 100 mark. Advice?

 

[Richard320]

Re: Got TF100 kit this afternoon--too late to start SLAM? **updated with initial

Just took my first test readings with TF100

FC 8
CC 0.5
CYA 90 (my husband thought maybe 80) repeated several times in different areas

didn't complete ALK or ph because I figured I was going to get "drain the pool x%" before SLAMing, (I already drained over 27 inches this past week and refilled, I wonder how high my CYA level truly was!!!)

I also used a strip test just to see about stabilizer and it was in the 100 mark. Advice?

Drain.

You might want to try vacuuming to waste using the vacuum hose as a siphon since you have an above ground pool. Get rid of any crud that's settled on the floor and lose some CYA at the same time.

And then throw away the test strips. You have the Cadillac of test kits,w hy mess around with a Yugo?

 

[ActivFam]

Re: Got TF100 kit this afternoon--too late to start SLAM? **updated with initial

Drain.

And then throw away the test strips. You have the Cadillac of test kits,w hy mess around with a Yugo?

How much? I drained over 27 inches this past week...only thing I kinda know was that my stabilizer was at 150 mark (who knows how much over) before draining. I only used strip to help me guess if I did my first test for CYA right...I better throw away they are what got me in this trouble along with Family Leisure who only sells strips...go figure!

 

[Richard320]

Re: Got TF100 kit this afternoon--too late to start SLAM? **updated with initial

How much? I drained over 27 inches this past week...only thing I kinda know was that my stabilizer was at 150 mark (who knows how much over) before draining. I only used strip to help me guess if I did my first test for CYA right...I better throw away they are what got me in this trouble along with Family Leisure who only sells strips...go figure!

If it's 80ish, replace another quarter. What's that, a foot? 60 is do-able and will work afterwards. If you overshoot and drop to 50 CA, even better.

You can try one of the alternative test methods, too. Fill to the 90 mark, then hold it down waist level and take a look, Still see a dot? Add more to get to 80 and repeat.

You can also pour the sample back and forth between mixing bottle and view tube again and again and again until you're confident of the reading. Then it's straight arithmetic.

 

[jblizzle]

27" should have been over 50% of the water. The CYA reduction is the same as the water replaced. Replace 25% of the water, lower the CYA by 25%. Replace 50% of the water, lower the CYA by 50%.

I would suggest 50% so you have a reasonable CYA.

 

[mclaflin]

My pool was green and I started about that time. I could tell a difference the next morning.

Start now. Test every hour and replenish as needed.

 

[ActivFam]

Replaced 30% of water

7/7 4:20 pm Test results
water temp: 72 degrees
FC 6
CC 0
CH 175
CYA 60
pH 7.5
ALK 260 (our city water is always high in ALK after filling pool or hot tub)

Recommendations? lover pH some before starting SLAM?

 

[Richard320]

Replaced 30% of water

7/7 4:20 pm Test results
water temp: 72 degrees
FC 6
CC 0
CH 175
CYA 60
pH 7.5
ALK 260 (our city water is always high in ALK after filling pool or hot tub)

Recommendations? lover pH some before starting SLAM?

You're good! That's it, exactly.

 

[ActivFam]

You're good! That's it, exactly.

One more question... we added about 45 oz of muriatic acid to lower TA/pH per pool math.

1.5 hours later test result is:
Ph 7.0
ALK 190
Is that close enough for SLAM?
Thanks for your help! Really want to get it right this time!

 

[Richard320]

One more question... we added about 45 oz of muriatic acid to lower TA/pH per pool math.

1.5 hours later test result is:
Ph 7.0
ALK 190
Is that close enough for SLAM?
Thanks for your help! Really want to get it right this time!

Yes. Go!

 

[ActivFam]

SLAMed pool all day yesterday 7/8 started at 7 am. CYA 60 so kept Shock FC at 24 (or above, it got to 26 ppm)

7/9 6:20 am readings
FC 25.5 PASS (last night at 8:30 was 26)
CC 0.5 PASS
Pool looking noticeably better, no signs of algae MAYBE

What to do? I can see bottom of pool, but still not totally clear, my FC is above recommended Shock FC level, what to do next? retest after sun has been on pool?

 

[mknauss]

Read the SLAM Process article. There are three criteria to meet a successful SLAM, you met two. Last one is crystal clear water. Stay at it until you have that and then run the OCLT.

 

[ActivFam]

Checked pool at 11 am and saw about a dozen small quarter sized patches of algae. Checked FC 25. Brushed and vacuumed.

Is this normal to still get patches of algae despite having chlorine at shock level for over 28 hours?

 

[Richard320]

Checked pool at 11 am and saw about a dozen small quarter sized patches of algae. Checked FC 25. Brushed and vacuumed.

Is this normal to still get patches of algae despite having chlorine at shock level for over 28 hours?

I wouldn't think so, unless you missed some spots brushing and the slimy biofilm didn't get broken up.

 

[ping]

Is there a ladder inside the pool, those things are notorious for holding on to algae?