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    How to get through SLAM...faster?

    Ok. Good to learn this. Thank you for your answers & advice aussieta and jblizzle!
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    How to get through SLAM...faster?

    Hey all! Looking over my notes, last year (2018 season) it took 9 days to get through SLAM. Which meant the sand filter ran 24 hours a day for that entire time. Also, in total it took just over 24 gallons of liquid CL (10%) to do it. Can I speed-up this whole SLAM process? (Let's assume the...
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    Calcium hardness and vinyl liners

    Thanks for your reply Poolzz. I understand what you mean, but the "so, so much cheaper" aspect applies in my case as I would be able to use a 50 lb. container of Cal-Hypo 73% for at least two seasons. As far as I know the chlorine in Cal-Hypo does not deteriorate, and as we know the chlorine %...
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    Calcium hardness and vinyl liners

    Thank you for your responses and help. Very much appreciated. If I may ask some follow-ups: 1.) Regarding the cloudiness that is mentioned, is that when the Calcium Hardness surpasses a certain level in the water? And is that level 350ppm? Or a different level? Or is is cloudiness that is...
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    Calcium hardness and vinyl liners

    Thank you for your reply, mknauss! You'll have to forgive my lack of knowledge, but what is it that Calcium scale does to a vinyl in ground pool that is bad?
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    Calcium hardness and vinyl liners

    What specifically is the danger of high Calcium Hardness on in ground vinyl pools? I've searched for relevant threads on the forum, and found this recent thread. Is it that high calcium levels can lead to corrosion of metal pipes? Plastic pipes? The reason I am asking is it appears to be less...
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    Cyanuric Acid CYA "Recommended Range" Question

    Hey, thanks mknauus. Much appreciated info. So the test is +/- 10ppm? Wow! That's a big swing. So really a reading of 40 could be 50? I'm in Orange County, NY. It's the Hudson Valley about an hour+ outside of NYC. The pool gets plenty of sun during the day. It is surrounded by trees though and...
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    Cyanuric Acid CYA "Recommended Range" Question

    Where in the range is best? The "recommended Cyanuric Acid" range for my pool is "30 to 50". Does that mean that the optimal/best level is right in the middle, in my case "40"? Or, does it mean that if CYA is anywhere in the 30 to 50 range that it doesn't matter much, that it's "fine"...
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    SLAM: First time SLAMing. Big FC overnight drop!

    Thank you for your reply & help, tim5055. I didn't know that a 3-4pm loss in FC is an expected loss. There was no one using the pool today at all. I thought perhaps a drop of 1-2 ppm (preferably 1 pmm) during a day would be normal. Our pool does not get daily activity/swimming at all. Now, with...
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    SLAM: First time SLAMing. Big FC overnight drop!

    Darn...I just tested again (3PM EST, six hours after my morning test) The FC has dropped to 11.5 ppm! Why? And now the CC is a full 1.00 ! This morning it was essentially "0.00"! Any ideas as to what may be happening? Today there is not much direct & strong rays from the sun either.
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    SLAM: First time SLAMing. Big FC overnight drop!

    Thanks BattleOfYakima! I so much appreciate your help & guidance through this process. I forgot to mention that the good OCLT tests were indeed done at the normal 10ml of water! The new chemicals arrived yesterday and I was able to go back to 10ml water. Since you mentioned hesitancy at 5ml...
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    SLAM: First time SLAMing. Big FC overnight drop!

    I may have had an "Eureka!" moment. Thanks greatly for your help & advice to this stage. I tested for the Overnight Free Chlorine Drop twice this morning. Last night the FC was 15.5ppm - First test: FC 15.5 ppm ! - Second test (~20 min later): 14 ppm So...would this signify that the SLAM...
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    SLAM: First time SLAMing. Big FC overnight drop!

    This is getting tiresome. 15th day of SLAMMING the pool... I realize the first week is basically a "throw away", as I am confident the Diamond Clear Mega Shock 12.5% liquid shock was highly degraded. So I was using bad chlorine. Last night, I tested and the FC was low, so I put in enough CL...
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    SLAM: First time SLAMing. Big FC overnight drop!

    Thank you domct203! I will be doing my best to make the 5mil method work in the interim.
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    SLAM: First time SLAMing. Big FC overnight drop!

    Is it dead algae/debris....or is it undissolved Cal-Hypo shock ? Yes, this is the question I'm at now. I decided to use Cal-Hypo 56% (HTH from Walmart) because the pool has low HC anyway. As soon as I used it, the FC went up to the SLAM/SHOCK level as intended. I sprinkled it around the deep...
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    SLAM: First time SLAMing. Big FC overnight drop!

    Battleofyakim, I'm in lower NY state. The pool gets plenty of sun during the day, but also times of shade as there are large trees around it (but they don't drop too much into the pool) I was reading around the TFP site, and under the How to Chlorinate page it is suggested that typically you...
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    SLAM: First time SLAMing. Big FC overnight drop!

    B.O.Y (Battle Of Yakima!), you have been so helpful with ideas & suggestions. Thank you so much. So, I tool a water sample to my local pool store to test. They use a syringe to collect my sample and put it in a spinning cartridge type tester (I have know idea what it is called). The pool...
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    SLAM: First time SLAMing. Big FC overnight drop!

    (I added a signature!) Man, this is frustrating. But I'm persisting! - Last night the FC was at the shock target of 14 ppm Yeah! - Filter has been on 24h a day - This morning (tested at 11:30Am, pool has been in the sun already for a few hours), the FC dropped to 8 ppm! Boo! This is the the...
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    SLAM: First time SLAMing. Big FC overnight drop!

    BattleofYakima, thank you for your help. I just tested and the FC level is just at 14 ppm! And it only took a week! (Ugh. Now I know I should have "overkilled" it right from the start) Now comes the part that makes me uncertain, as it's tough to know what amount to put in to "maintain" it at...
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    SLAM: First time SLAMing. Big FC overnight drop!

    Thank you domct203! I will fill out my signature. I don't have all that info in front of me. And thanks for combining the posts. (I didn't know if I should continue my other post or start a new one) From the beginning, I added the recommended amount of 12.5% liq. CL, per Pool Math. But...I...
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    SLAM: First time SLAMing. Big FC overnight drop!

    SLAM: Best to Get to FC Shock Target Quickly? Hi all, This season I've decided to do the TFP method, only liquid CL. I opened the pool seven days ago. I've been doing the SLAM method, and I'm learning along the way. My water is crystal clear and has been the entire time. There was no FC...
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    SLAM: First time SLAMing. Big FC overnight drop!

    Quick follow-up question: How soon after putting in the amount of liquid CL to get to the SLAM level (Pool Math recommended) should I wait to test the water again?' Or...another way to ask this is, how long does it take for the CL that I put in to "register" in the water?
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    SLAM: First time SLAMing. Big FC overnight drop!

    tim5055, thanks very much for the quick & helpful reply. I needed those answers for encouragement to keep on pressing on with the SLAM process. I'll now add the additional CL. Thanks again!
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    SLAM: First time SLAMing. Big FC overnight drop!

    Hi everyone. I'm excited, as I've followed TPF for a long time but this is my first season where I'm doing all Liquid CL & following the TFP method. I opened the pool, and it was already quite clear.I have a FAS-DPD kit now. The FC was pretty much zero. I started the SLAM method. My CYA is...
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    High CYA + High CL = Metal Staining ?

    smforte, sorry but I didn't catch that you said high CL and high PH can cause metal to come out of sequesterant. But is High CYA involved at all? Or related at all to metal release, or anything else with metals?
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    High CYA + High CL = Metal Staining ?

    Hi smforte! Thanks for your reply & help. Yes, I definitely have metals in the water and staining. Using this site, I knew to use ascorbic acid which worked well. Then once back in solution, I've been using the Walmart Metal Control in an effort to keep the metals in solution. But, what I...
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    High CYA + High CL = Metal Staining ?

    Do high levels of CYA plus high levels of Chlorine promote metals from coming out of water solution, thus promote staining? I ask because I "think" that's what the Pool Store told me after they tested my water. And I do have high levels of both. They definitely said High CYA...but I'm unsure...