Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 10 of 10

Thread: High ph and chlorine after opening pool

  1. Back To Top    #1

    Join Date
    May 2015
    Location
    oxford, mi
    Posts
    4

    Exclamation High ph and chlorine after opening pool

    My wife and I recently purchased a house with an inground pool. The pool was opened last week -- though not by the most helpful person. He managed to get get the filter, pump and heater up and running. Also dumped in four gallons of chlorine and left. The total volume of the pool is a bit of a mystery. As the pool is kidney shaped, and the shallow is 3.5' (supposedly) to 12.5'. My calculations, using an online calculator, came to: 30000 gallons of water.

    After cleaning the pool several times -- there are some nearby trees -- we started to test the water and discovered that the chlorine level is at 10ppm and the PH at 8ppm.

    The pool gets decent sun exposure, and for a while we had the pool heater + solar cover on.

    Doubting my readings, I took a sample to the local pool shop. They recommended a product called: PhosFREE.

    We cleaned the bottom -- again -- and added 1.5L of the product to the water. The water quickly clouded.

    The next morning there was "goo" at the bottom of the pool. Not the entire bottom, but in patches. We cleaned this up. And tested the water again -- this time with a home strip kit.

    My readings had not changed.

    Per the bottle, I added the remaining 1.5L into the pool. 24 hours later. Some "goo". Not much. But the readings are still consistent.

    I've been reading that adding muriatic acid to the pool is a means to drop the PH. Is this safe, recommended? Or am I chasing a different problem?

    Advice, comments, questions, are welcome.

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: High ph and chlorine after opening pool

    First, Welcome to TFP!!

    Yes, Muratic acid is what you want to lower your pH. get it at Lowes, much less expensinve than most pool stores. Use Pool Math to figure out how much to add.

    The pool store is going to recommend many things to you, all with the same goal - sell you something. Skip the PhosFree.

    If you have read around here much you have probably seen that not much credence is given to pool store testing. While you would think that a "professional" would be the best, unfortunately in most cases it is quite the opposite. Between employees who blindly trust the word of chemical sales representatives and high school kids working in the pool store for the summer you end up with poor results from their testing.

    If you are going to follow our pool care system you will need to pick up one of the recommended test kits. To effectively practice the TFPC methods, the FAS/DPD chlorine test is essential. All the kits on the list contain that test while very few other kits do. The kits sold at the pool store generally won't won't cut it, but be careful pool store employees are known to say “it's the same thing”. Generally it's not!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  3. Back To Top    #3

    TFP Guide

    Azgirl71's Avatar
    Join Date
    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: High ph and chlorine after opening pool

    Welcome to TFP! The first thing I recommend is you ditch the PS reading and the Test strips. If you are serious about taking over your pool you will need a recommended test kit such as the TF 100 linked in my signature.

    Don't worry about phosphates. That is just a way for the PS to get you spend money.

    I recommend reading through Pool School. Especially the ABC's of pool water chemistry.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

  4. Back To Top    #4
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: High ph and chlorine after opening pool

    Learning how to care for your pool will be like trying to drink from a fire hose for a while. Lots of information coming at you fast.

    Lisa has a good point about reading, start with these:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  5. Back To Top    #5

    Join Date
    May 2015
    Location
    oxford, mi
    Posts
    4

    Re: High ph and chlorine after opening pool

    So, regarding the muriatic acid. By my basic calculations, 78 fl ounces should be enough to drop the PH to a safe level.

    Am I right with that math?

    Kind of a novice when it comes to pool chemistry.

  6. Back To Top    #6
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: High ph and chlorine after opening pool

    Quote Originally Posted by stomp442 View Post
    So, regarding the muriatic acid. By my basic calculations, 78 fl ounces should be enough to drop the PH to a safe level.

    Am I right with that math?

    Kind of a novice when it comes to pool chemistry.
    Did they give you the TA? That will affect the amount you add, but 78 oz sounds very high.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  7. Back To Top    #7

    Join Date
    May 2015
    Location
    oxford, mi
    Posts
    4

    Re: High ph and chlorine after opening pool

    Thanks for the tip on the testing kit. Amazon Prime...will be here on Friday.

    - - - Updated - - -

    TA = 180ppm

  8. Back To Top    #8
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: High ph and chlorine after opening pool

    Quote Originally Posted by stomp442 View Post
    Thanks for the tip on the testing kit. Amazon Prime...will be here on Friday.

    - - - Updated - - -

    TA = 180ppm
    Do you have Muratic acid on hand? If not, go to Lowes, in the paint section they sell it in two strengths. You want the blue label 31%. Using that strength I see you would be using 52 oz
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  9. Back To Top    #9

    Join Date
    May 2015
    Location
    oxford, mi
    Posts
    4

    Re: High ph and chlorine after opening pool

    Thanks for the info. I don't have the acid on-hand, nor do I have a Lowes nearby. But with the strength percentage, I'm willing to bet that I can find what I need at ACE.

  10. Back To Top    #10
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: High ph and chlorine after opening pool

    Welcome to TFP!

    Use PoolMath to calculate how much to add.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

Posting Permissions

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