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Thread: New pool owner. Need advice

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    Manny2587's Avatar
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    New pool owner. Need advice

    Hey guys. Just moved into my new house about a month ago. My first time owning a pool (I'm 29 and pretty mechanically inclined so I feel confident I can do this). I'll provide the pool details belong after a short story.

    The previous owners used 3" chlorine pucks. The pool was very clear when I moved in. About a week ago, I noticed a hint of green on the floors and walls in some spots. I brushed it and realized I was beginning to have algae. I quickly used the chemicals that the old owners left for me (cal-hypo "shock"). I used 4x 1 pound bags. It killed a good amount of algae (brown dirt looking substance left on the floor the next couple days).

    The pool has gotten worse. I ordered my TF100 test kit last week and it got lost in the mail. Panicking because I have a house warming party this coming Saturday, I shocked the pool with 5 pounds of cal-hypo...ugh. That was yesterday evening.

    Sooo the post office found my package apparently and it was quickly delivered today (was suppose to be here last Friday). I tested everything at least 2 times, some things I tested 3 times just to make sure I was getting consistent readings.

    Details:
    Approximately 35,000 gallons
    Vinyl liner about a year old.
    Sand filter with multi-port valve

    FC- 24
    CC-.5
    PH-7.8
    TA-110
    CH-150
    CYA-90- >100 (I did this test 3 times with my pool water. Twice I got a little over the 100 line and once I got a little below 100 line. Meaning twice it showed over 100 CYA and once it showed half way between 90 and 100)

    I also purchased the CYA test solution of 50 ppm and I tried that twice. I got 60 once and 50 once.

    My pool is now very green in the deep end. I can barely see the main drain. I'm on well water here and my hose delivers 5 gallons a minute. I have 6 gallons of liquid chlorine on stand by and can obviously get more. What are my options to have a clear, swim able pool by this Saturday evening, if at all possible.

    I foresee a partial drain/refill in my future. Thanks in advance for all the help, this forum is awesome. Here are some pictures




    Deep end





    35,000 gallon in ground vinyl liner
    Pentair Meteor sand filter
    Hayward 1.5hp super pump

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    Re: New pool owner in need of guidance

    Let's get your CYA nailed down....100 could be more. Run a diluted test, 1/2 pool water and 1/2 tap water...multiply the CYA result x2
    18' x 38' Pool, 3' to 8' Depth
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    Mod Squad YippeeSkippy's Avatar
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    Re: New pool owner. Need advice

    First off, make a new pool water sample to test CYA using 50% pool water and 50% tap water. Then use this mixture to perform a new CYA test, then double the results. Your CYA may turn out to be much higher than you think. And yes, I foresee a water exchange in your future too. There is no other way you'll be able to even attempt to get it clearer otherwise, and even then a proper SLAM procedure needs to take place. You can drain but never go under a foot or two in the shallow end so you don't disrupt the liner.

    Please refer to Pool School for the way to do a SLAM (see link up at the top right of this webpage)
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    Re: New pool owner in need of guidance

    Quote Originally Posted by robertmee View Post
    Let's get your CYA nailed down....100 could be more. Run a diluted test, 1/2 pool water and 1/2 tap water...multiply the CYA result x2
    I believe a diluted test was performed and the CYA levels were 50-60 (making the levels 120). It will be difficult to perform the SLAM at the 120 level. The pool is quite large and will require a large water replacement. Additionally, I would not use well water at 5 gallons per minute. I would test your house water and well water (unless you are all on well and have some water system) to remove impurities out of the water.

    Based on CYA level of 120, the SLAM level that must be maintained is way over 39. Therefore, it is suggested you drain and fill to reduce the level down to at least something manageable. Definitely add liquid bleach to stop the algae from growing. Please have your water tested for metals, especially if well water has been used before.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
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    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

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    Mod Squad pooldv's Avatar
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    Re: New pool owner in need of guidance

    Welcome to TFP!

    With CYA of 120 your shock level for SLAMing is 48. The FAS-DPD chlorine test is good up to 50 ppm. It is going to take a lot of chlorine/bleach to SLAM with that CYA level but it can be done. Be sure to follow all the steps of the process. Testing and adding chlorine at least 3 or 4 times per day, more is better. Brush daily and remove all debris fro the pool so the chlorine is working on algae and not leaves. Those are the key steps to making a SLAM go quickly.

    Here is the process, step by step, Pool School - SLAM - Shock Level And Maintain
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    Mod Squad YippeeSkippy's Avatar
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    Re: New pool owner in need of guidance

    Quote Originally Posted by Catanzaro View Post
    I believe a diluted test was performed and the CYA levels were 50-60
    I think that reference was to his performance on the *test*test solution. He mentioned also having purchased the "standard solution" which is a bottle of known 50 CYA fluid that helps you learn how to perform the test because you *know* it will be a 50 result, but it helps you see how that looks.
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

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    Re: New pool owner in need of guidance

    CYA was not 120, as I understood the OP's narrative. With unusual foresight for a new poster, he ordered the CYA standard solution along with the test kit, and got 50 and 60 ppm when running the test with the standard. That puts measured CYA back at the 90-100 level he reported. Still a high SLAM level, but not quite as bad as with 120.
    18' x 48" ring top pool (Summer Escapes); 5500 gallons; set up June - October, stored during winter; Intex 2500 gph pump (B size cartridge filter) Hayward 21" sand filter + 1.5 hp single speed Powerflo Matrix pump (upgrade October 2016) *** K-2006 test kit, refills from tftestkits

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    Re: New pool owner in need of guidance

    Quote Originally Posted by YippeeSkippy View Post
    I think that reference was to his performance on the *test*test solution. He mentioned also having purchased the "standard solution" which is a bottle of known 50 CYA fluid that helps you learn how to perform the test because you *know* it will be a 50 result, but it helps you see how that looks.
    Question: Based on this test, is the CYA around 120? That is based on the standard solution?

    All the CYA testing I have done for people have always been with 50% tap water. I only test once and then say "now it is time to order your own TF-100 Test Kit". Thanks!
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
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    Re: New pool owner in need of guidance

    Yes, it's possible. I hope you're committed. At minimum, you'll be adding bleach before work, after work, and at bedtime. More often is better. Once we had a guy set his alarm every two hours and got up all through the night. He turned a gooey green swamp into a pool in three days. But he was an extreme case.

    Call your CYA 100 (Try the dilution method in Extended Test Kit Directions step 9) to be sure. Shock level is 39. You are fortunate that your CH level is low, so if you have some Cal hypo left over, you can use quite a bit of it in place of bleach. 25 lbs of it in a 35000 gallon pool only adds 44 CH. DON'T Add it all at once. Let poolmath calculate the doses. Cal-hypo does tend to make the water cloud up a little, so I'd go with bleach only at least Friday and Saturday. Guests can swim in it up to shock level, so as long is it's down below 39, it's no problem.

    Just follow the SLAM instructions. If you choose to use some Cal-hypo instead of bleach, just don't use more than one bucket of it.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: New pool owner in need of guidance

    Correct, I ordered the "50 ppm standard solution" so I could learn how to properly run this test and make my results consistent.

    However, I just completed a 50/50 solution with pool/tap water and it showed right between 50 and 60. I would call it closer to 60, I did it a couple times and 60 seems more consistent. So yes, let's assume CYA is 120. I had a pool inspection done while under contract on the house at the beginning of July. The pool tech that did the inspection got a CYA reading of 85ppm. So the increase from 85 to 120 in 1.5 months seems plausible while using trichlor tablets right?

    I think I might start a slam at this high CYA level and see how it goes. I have some free time this week from work, so I'll be able to keep a close eye and test a lot.

    Should I leave the PH alone for now? It crossed my mind that my current test may not be accurate after the shock and my current FC level of 24.




    35,000 gallon in ground vinyl liner
    Pentair Meteor sand filter
    Hayward 1.5hp super pump

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    Mod Squad YippeeSkippy's Avatar
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    Re: New pool owner in need of guidance

    your pool is LARGE...that's a LOT of liquid chlorine to have to haul home. A LOT! You *sure* you want to attempt this without first draining and replacing some of the water???? Not a good idea really.

    Its safe to drop your water level by half and refill, that would be very helpful if you can manage even just that. Pool Math says to go from 120 --> 50 is a 60% water replacement. Then your SLAM level would be 20 ppm.

    And no, your pH is not going to be accurate at 24 none less whatever
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

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    Re: New pool owner. Need advice

    Ok guys. For the past 48 hours I have been maintains my chlorine levels above the Slam level throughout the day and night. I have retested my CYA several times and it's 100 ppm.

    My slam level of FC is 43. I've been keeping it at 43-45. At night around midnight, I bring it to about 50 ppm and lose between 7-8ppm by 10am, then add bleach.

    I brush the walls and floor 2-3 times a day and I've just recently been using my Dolphin Nautilus Plus robot to help out a bit.

    My sand filter pressure barely moves. My clean pressure is 12.5psi and after 24 hours it's at 14.5psi. I can see the algae on my stairs where it has collected in the little dimples. It looks yellowish/greenish/brownish and when I touch it, it breaks up very easy into the water, like sand almost. It's definitely not sand though. I can't even feel anything when I touch it.

    The pool doesn't really look any different after 48 hours. Not worse, not better/clearer. Do I need to just stick with it?




    35,000 gallon in ground vinyl liner
    Pentair Meteor sand filter
    Hayward 1.5hp super pump

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    Re: New pool owner. Need advice








    35,000 gallon in ground vinyl liner
    Pentair Meteor sand filter
    Hayward 1.5hp super pump

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    Re: New pool owner. Need advice

    Quote Originally Posted by Manny2587 View Post
    Ok guys. For the past 48 hours I have been maintains my chlorine levels above the Slam level
    The pool doesn't really look any different after 48 hours. Not worse, not better/clearer. Do I need to just stick with it?
    Yes, stick with it. It has only been 3 days since you started (based on your post).

    Keep track of your progress daily (how much liquid bleach you are adding and how much you are loosing). These #'s should be gradually decreasing. Please remember not to stop until you passed all 3 Test(s). Some people stop when the water is clear.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

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    Re: New pool owner. Need advice

    " lose between 7-8ppm by 10am"
    This means keep going. Algae is consuming this FC and dying.

    "12.5psi and after 24 hours it's at 14.5psi"
    This is the dead algae.

    You are just not over the hump yet.
    Keep at it, it will pull through.
    40k gal freeform, IG pebblesheen, 9'x'6' raised spa, 2-1/2 hp Whisperflo, 520 sq/ft cartridge, Legend w/ booster, Intellibrite 5g in pool @ spa, Rainbow 320 Chlorinator(retired),
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    Manny2587's Avatar
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    Re: New pool owner. Need advice

    Thanks for the replies. On another note, do you think it's ok to use the robot in my high FC levels? It's brand new


    35,000 gallon in ground vinyl liner
    Pentair Meteor sand filter
    Hayward 1.5hp super pump

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    Re: New pool owner. Need advice

    High is a relative term.
    It is still much more diluted that the strength you would use to clean your floor.
    Your Robot should be fine.
    40k gal freeform, IG pebblesheen, 9'x'6' raised spa, 2-1/2 hp Whisperflo, 520 sq/ft cartridge, Legend w/ booster, Intellibrite 5g in pool @ spa, Rainbow 320 Chlorinator(retired),
    Mastertemp 400k BTU, 3x3 hp Whisperflo Swimjets, 2x2 hp Whisperflow for 15ton moss rock waterfall, Intelitouch Controller, 850 sq/ft Travertine deck, Gas/Wood firepit,
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    Re: New pool owner. Need advice

    And the CYA is buffering it down too!!
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Re: New pool owner. Need advice

    So I just checked my filter pressure and it has dropped from 14.5 psi to 12.5 psi. I did not back wash or do anything at all. Why would the pressure drop on its own? It's a brand new, oil filled gauge also, I installed it last week.


    35,000 gallon in ground vinyl liner
    Pentair Meteor sand filter
    Hayward 1.5hp super pump

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    Re: New pool owner. Need advice

    Get 5 gallons of bleach and 1 64oz bottle of Algetec. The Algetec will knock out the green and it has a clarifier in it too. Brush the entire pool right after you add both chemicals and run the pump 24/7. It will be blue in hours.

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