Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: best/safest way to shock - new IG liner

  1. Back To Top    #1

    Join Date
    May 2016
    Location
    Southington, CT
    Posts
    2

    best/safest way to shock - new IG liner

    Hello everyone:

    I didn't see this posted, i am new to this site so if i missed it i apologize. We opened the pool to find a significant tear that required us to have a new liner installed. I want to make sure that we don't do anything to hurt the liner. My question is... will shock stain (or bleach) my liner? I thought it discolored our old liner when we may have added it and it sat at the bottom but that could have been there when we purchased the house. I saw some on this site do not like non-chlorine shock but i thought that would be the safer route. What is the best/safest way to "shock" and how do you apply it? I have always poured it in a bucket first and mixed it with water but i've seen a few people who seemed to know their stuff suggest adding it right into the skimmer basket. Thanks for any help.

    Dan
    24k gallon IG pool... 18x36. DE Filter with Hayward Pump and in-line chloronator. Southington, CT

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: best/safest way to shock - new IG liner

    Welcome to TFP!

    We do not ever "shock" our pools. If you maintain adequate FC levels that are a function of your stabilizer, CYA, levels, then your pool will not get algae.

    If you do have a problem with the water, then you follow the SLAM process, which was designed to be safe for your pool.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3

    TFP Guide
    PAGirl's Avatar
    Join Date
    Jun 2012
    Location
    Central PA
    Posts
    2,388

    Re: best/safest way to shock - new IG liner

    Welcome to the forum!

    If you go to the Pool School section there is a chart that tells what your chlorine level should be at based on what your CYA (stabilizer). If you stay in the recommended ranges and pour it (as in liquid chlorine or bleach) in front of a return while the pump is running, it should not bleach out the liner.

    Pool School - Chlorine / CYA Chart

    Pool School - Handy Reference

    It's more of a process of testing and adding only the things you really need, based on what's already in the water, and where you need it to be, using PoolMath, found here:
    http://www.troublefreepool.com/calc.html

    The recommended levels can be found in the previously mentioned links.

    A good test kit, that can measure chlorine levels above 5 and the CC's (basically chlorine that has been "used up") and the rest of the recommended criteria. That can be found here:
    TFTestkits.net
    26' X 52" Intex Ultra Frame. Intex Sand Filter
    26' X 52 Intex Ultra Frame Install
    You can lead a horse to (clear) water, but you can't force him to swim in it!

  4. Back To Top    #4

    Join Date
    Apr 2013
    Location
    Sacramento, CA
    Posts
    2,769

    Re: best/safest way to shock - new IG liner

    In a direct answer to your question yes some "shock" products can damage or bleach your liner. There are almost more shock products out there than there are cars on the LA freeways so being more specific is not really possible.

    If you follow the TFP method you will not need to shock your pool every week or so. And if something does go wrong and you need to SLAM you will have adequate stabilizer in the pool so the chlorine should not be a problem to the liner.
    22k gallon IG pebblefina, Jandy 1.5 HP VS, Jandy CV Cartridge filter, Fafco solar panels, Polaris 360 supply side cleaner, waterfall

  5. Back To Top    #5

    TFP Guide
    BattleOfYakima's Avatar
    Join Date
    Apr 2016
    Location
    Central Florida
    Posts
    1,333

    Re: best/safest way to shock - new IG liner

    As jblizzle mentioned, mainstream pool store "shocking" is their solution for pool owners not maintaining enough free chlorine (which they don't even test for individually). They shock to try to makeup for negligence.

    We don't ever let FC drop to the point where things can grow. We never fall behind. We never shock.

    That being said, accidents happen, sometimes it's green when you open, or you help someone with a green pool or a pool is using too much FC per day, or it smells like chlorine. When any of these happen, we SLAM as described in pool school.

    While some of us do use floater pucks on rare occasions, 99% of the chlorine we add comes from bleach or "chlorine liquid pool shock" which is really just 10% or 12.5% bleach LOL.

    To prevent damage to liner or equipment, we use test kits that have the FAS-DPD chlorine test, that unlike all other testing methods, can distinguish free chlorine from combined chlorine. This difference is critical. Using this data and PoolMath calculator, in combination with CYA testing and the CYA chart, we know exactly how much FC to maintain, how much to add when, and we always add it after the pump has been running for 20 minutes, pour the measured amount in front of the return jet (filtered waste pumping back into pool fast) and we pour very slowly so it dilutes immediately and there never is a concentrated chemical touching the liner. We always leave pump running for 30 minutes after adding. If adding a lot of bleach or muriatic acid we always brush the bottom immediately after adding to stir the pool and help any of the higher density acid that might have sank to be completely incorporated and diluted. We take no chances, we suffer no damage.

    Everything I just typed is either in pool school or in the forums and can be searched for using the site search for specific questions/techniques. I just had the time and felt generous. If you have any other questions, please do feel free to ask if you can't find the answer in pool school or using search. We are here to help. TFP is well documented with over 100,000 members, active with thousands of people online at the game time frequently, and I believe the greatest source of pool care knowledge on the internet including government publications.
    If I was effective, and your pool makes you smile, please make me smile and CLICK HERE to Become a TFP Supporter!
    Also, please make AmazonSmile donate to TFP by CLICKING HERE, at no cost to you!
    My Florida Pool: 20k IG plaster cart K-2006 | Washington State Pool I help with: 17k AG vinyl sand TF-100

  6. Back To Top    #6

    Join Date
    May 2016
    Location
    Southington, CT
    Posts
    2

    Re: best/safest way to shock - new IG liner

    Thank you for the welcome and for all of the great info. i will certainly keep searching the forums for more help. i've been on forums like this before and was fully expecting someone to bark at me for not providing enough detail or for not finding the info. on my own (and i did search) or something like that... thanks for making me want to stick around.
    24k gallon IG pool... 18x36. DE Filter with Hayward Pump and in-line chloronator. Southington, CT

  7. Back To Top    #7
    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Location
    Tallahassee, FL
    Posts
    26,701

    Re: best/safest way to shock - new IG liner

    LOL no barking allowed at TFP! You will love it here! You are already head of the game with your location and signature fillled out! THANKS!

    With a good test kit and a brush we can help you keep your pool clear and looking like a jewel

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  8. Back To Top    #8
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: best/safest way to shock - new IG liner

    Welcome!

    Two things will prevent liner bleaching when shocking
    1) Don't shock. If you maintain the proper FC/CYA ratio you won't get algae so you'll never need to shock. That might be difficult where you live if the pool gets closed during the winter, but in my climate, the pool is open year round even if its too cold to get in, and over five years without green water.
    2) Dilution. Dribble chemicals in front of the return stream and they disperse into nothingness before your eyes. You can actually see the yellow bleach cloud just expand and fade away. And a couple quick swipes with the pool brush will ensure nothing has a chance to puddle. It's much like adding cream to your coffee but on a gigantic scale. Stir it in, get some cross-currents going.

    What chemicals to use and how to add them are explained in Pool School - Recommended Pool Chemicals
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •