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Thread: Baqua to chlorine conversion

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    Baqua to chlorine conversion

    Help! I started a baqua to chlorine conversion yesterday around 5 pm. I added 6-1/2 gallons of liquid chlorine to my 25000 gal. pool. The FC level went way over the 15 I expected, like 25 or so. It stayed that high overnight. This afternoon the chlorine tests at 0. However, the water is chrystal clear. Now what?

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    Mod Squad jblizzle's Avatar
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    Re: Baqua to chlorine conversion

    Welcome to TFP!!!

    Are you sure you had a Baqua pool?
    Did you test and track the FC and CC?

    Please add your pool details to your signature as described HERE as it will help us help you.
    Jason, TFP Moderator
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    Texas Splash's Avatar
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    Re: Baqua to chlorine conversion

    Hello! For those doing a Baquacil conversion, this page is a must: Pool School - Convert Your Baqua Pool to Chlorine. As Jason asked, it was baquacil correct? You would see a tremendous chemical reaction between the baqua and chlorine, not to mention the coagulation of "goo: beginning to form. If so, follow that page as directed and it will work very well.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: Baqua to chlorine conversion

    I've been using baquacil for 15 years, since pool was new. Last year I couldn't keep oxidizer level up, which is why I am converting. I have not added any bacqua products since last year's closing. Also, I changed out the sand in the filter before the conversion and plan to change it again after completion. I did get a reaction when I added the 6-1/5 gal. of chlorine, the water turned deep yellow-ish. By yesterday morning the water was clearer and FC tested very high at 6am, 25 or so. By afternoon, water was very clear and FC tested at 0. Backwash produced yellow/brown gunk for 2 minutes or so, then cleared. I added 3-1/2 gallons of liquid chlorine at 6pm and tested for FC at 7pm, it was at 20. At 6am today it was at 12. When chlorine was added yesterday, there was no visible reaction, water remained clear. I'm not sure how to proceed from here, I suspect FC will be back to 0 this afternoon. Thanks for the help! This site is awesome!
    Tim
    25k IG vinyl Hayward 1HP Superpump Hayward S200 sand filter

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    Texas Splash's Avatar
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    Re: Baqua to chlorine conversion

    No worries Tim. I think the key right now, even though you did a couple things apart from the ideal TFP conversion sequence, is simply to stay close to the pool (if you can) and maintain that FC of 15 "consistently". As noted on the link above to the conversion page, maintain that FC of 15 diligently until you lose no more than 1 ppm overnight. Once you reach that milestone, then change the sand and continue with the process. Of course FC will go very fast during the day because you aren't required to add stabilizer yet which could interfere with the process - that comes later after you change the sand. Hang in there.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: Baqua to chlorine conversion

    How strong was the Chlorine (8.25% or 12.5%) and how big were the jugs (Bleach "gallons" are only 121 oz.)

    To get chlorine to 15 for a 25,000 gallon pool you only needed 4 1/4 "gallons" of bleach. 6 gallons gets it to 20ppm. OTOH, 6 gallons of 12.5% gets your water to 28!!! With no CYA, that could pose an issue if you keep going that high. It is virtually off the charts!!!

    Now that your pool is clear, run (and post) a full panel of tests yourself (not a pool store). and use Poolmath to bump FC to 15. See if you pass an OCLT tonight, run another FC/CC test tomorrow morning, and bump FC back up to 15.

    My guess is you did not get all the BQ and you will have to keep at it for a couple more days.
    Chris
    17' x 35' outdoor in-ground Grecian shaped w/ vinyl liner. ≈ 21,000 gallons. Hayward S-200 Sand Filter and 1 HP Hayward Super-pump. Other Accessories: slide, light, ladder, fiberglass stairs, TF-100. Baquacil Conversion - June 2015, SLAM How-to, Chlorine/CYA Chart

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    Re: Baqua to chlorine conversion

    Okay. That explains some things. I believe the chlorine is 12.5%. I have 5 gallon jugs from pool store. That's undoubtably why it went so high. A full panel of tests, what does that include at this point besides FC/CC?
    Tim
    25k IG vinyl Hayward 1HP Superpump Hayward S200 sand filter

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    Texas Splash's Avatar
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    Re: Baqua to chlorine conversion

    Tim, always make sure to update the WEIGHT field on the Poolmath calculator to ensure FC accuracy when dosing. For now, focus on FC and passing an overnight (OCLT) test. Only then will you need to add stabilizer and adjust other items. If you were worried about pH, you could check that quickly if your FC drops below 10, but other than that, focus on FC and the steps on the conversion page.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Re: Baqua to chlorine conversion

    Quote Originally Posted by tcarr83 View Post
    Okay. That explains some things. I believe the chlorine is 12.5%. I have 5 gallon jugs from pool store. That's undoubtably why it went so high. A full panel of tests, what does that include at this point besides FC/CC?
    Free Chlorine (FC)
    Combined Chloramines (CC)
    Cyanuric acid (CYA)
    pH (Only accurate with FC<10)
    Total Alkalinity (TA)
    Chalcium Hardness (CH) - You have a vinyl liner so this is less, if not at all, important, but since you asked what comprises a full panel of tests, there it is.
    Chris
    17' x 35' outdoor in-ground Grecian shaped w/ vinyl liner. ≈ 21,000 gallons. Hayward S-200 Sand Filter and 1 HP Hayward Super-pump. Other Accessories: slide, light, ladder, fiberglass stairs, TF-100. Baquacil Conversion - June 2015, SLAM How-to, Chlorine/CYA Chart

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    Re: Baqua to chlorine conversion

    Making progress! FC/CC levels yesterday afternoon and this morning...1pm 0FC/0CC - added 3 gal. 12.5% chlorine, 5pm 1/0.5 - 3 more gal., 6pm 15/0.5, 7pm 14/<0.5 1/2gal., 8pm 13/<0.5 1/2gal., 9pm 17/<0.5, 10pm 13.5/<0.5 1gal., 6:30am 16/0.5, 7:30am 15/0.5 Time to change sand and add CYA?
    Tim
    25k IG vinyl Hayward 1HP Superpump Hayward S200 sand filter

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    Re: Baqua to chlorine conversion

    Quote Originally Posted by tcarr83 View Post
    Time to change sand and add CYA?
    I think you are close, but first, I have a question.
    Quote Originally Posted by tcarr83 View Post
    ... 10pm 13.5/<0.5 1gal., 6:30am 16/0.5,
    How soon after you add LC do you test the water? I ask this because typically, FC cannot go up without adding something to the water in the meantime. So it seems odd to have more chlorine in the morning than was there 8 1/2 hours prior. Did you add any at 10:00 and are you measuring the FC the same each time you test?
    Chris
    17' x 35' outdoor in-ground Grecian shaped w/ vinyl liner. ≈ 21,000 gallons. Hayward S-200 Sand Filter and 1 HP Hayward Super-pump. Other Accessories: slide, light, ladder, fiberglass stairs, TF-100. Baquacil Conversion - June 2015, SLAM How-to, Chlorine/CYA Chart

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    Re: Baqua to chlorine conversion

    Chris, I wait 1 hour after adding LC. I did add 1 gallon at 10pm, as FC level was 13.5 at that time.
    Tim
    25k IG vinyl Hayward 1HP Superpump Hayward S200 sand filter

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    Re: Baqua to chlorine conversion

    According to Pool Math, 1 gal of 12.5% will raise 25k gallons by 5ppm. That will presumably bring your FC to 18.5 at 10:00 last night. If your FC was 16 this morning, there is still some work to do. BQ is hiding somewhere.

    Adding CYA and a change in filter media shouldn't happen until after you pass the OCLT.
    Chris
    17' x 35' outdoor in-ground Grecian shaped w/ vinyl liner. ≈ 21,000 gallons. Hayward S-200 Sand Filter and 1 HP Hayward Super-pump. Other Accessories: slide, light, ladder, fiberglass stairs, TF-100. Baquacil Conversion - June 2015, SLAM How-to, Chlorine/CYA Chart

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    Texas Splash's Avatar
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    Re: Baqua to chlorine conversion

    Stick with it. Do the best you can to maintain an FC of 15 , even during the day under sunlight with no CYA protection. Once you pass the overnight (OCLT) test starting at an FC of 15, then you can move-on to the next phase of your conversion - the filter.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Re: Baqua to chlorine conversion

    Hey guys,

    Results from yesterday and this morning (time, FC/CC, chlorine added. if any):
    2:30 0/0 3gal, 3:30 6.5/1.0 6.75qts, 4:30 12/0.5 2.4qts, 5:30 12.5/<0.5, 6:30 13/0 1.6qts, 7:30 14/0 26oz, 8:30 15.5/<0.5 none, 9:30 15/0 none, 5am 14.5/<0.5 13oz, 6am 15/<0.5 none, 7am 14/0 26oz.

    Thoughts? Thanks.
    Tim
    25k IG vinyl Hayward 1HP Superpump Hayward S200 sand filter

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    Texas Splash's Avatar
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    Re: Baqua to chlorine conversion

    Congratulations! It looks like you passed the OCLT. Now it's time to clean out your filter and change the media. Get in there and hit it really well. Once the filter is cleaned up and new sand added, add enough CYA to reach 30 ppm. Continue to maintain FC at 15 ppm.

    Your conversion is complete when CC's are 0.5 or less two days in a row.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Re: Baqua to chlorine conversion

    Update: Changed sand in filter, added 100 oz CYA to get to 30ppm. Maintained FC at 15ppm through the weekend. This required much less chlorine after adding the stabilizer, adding by the quart or ounces vs. gallons! CC's have been 0.5 or less for many days now. Water looks perfect. Tests run yesterday (Monday) at 5pm: ph=7.2 FC=6 CC=0 CYA=20 TA=80. Is TA okay or should I add 117oz baking soda to get to 100? Other than that it looks like 52oz soda ash to get ph to 7.8 and 67oz CYA to get to 40? Am I using PoolMath correctly? I assume FC will continue to drop naturally down to 4 or so? Once it does how much 12.5% chlorine should I expect to need to add daily to maintain this level? Thanks for the help in making my conversion go so smoothly! Swimming by the weekend, for sure!
    Tim
    25k IG vinyl Hayward 1HP Superpump Hayward S200 sand filter

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    Re: Baqua to chlorine conversion

    Leave TA for now, watch pH in the next few weeks. It'll probably be fine.

    You could leave pH alone right now, it may rise on its own. You could point an eyeball up to break the surface too, that will use aeration to raise it. I definitely wouldn't shoot for 7.8 with soda ash.

    You could hold at 30 CYA, given location. FC will drop, yes. Use the chart to always select the right target for your CYA Pool School - Chlorine / CYA Chart.

    Daily use, probably somewhere around a quart or two each day. Depends on sun, swimmer load, etc.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
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    Re: Baqua to chlorine conversion

    I agree with Mr Bruce. Take it slow on the other levels, no need to rush anything. I'm assuming by doing so well that meant you passed two consecutive OCLT's right? If so, the conversion is officially complete and you are back to simply balancing your chlorine pool. Nice work. Quite a process and you did very well.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

  20. Back To Top    #20

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    Re: Baqua to chlorine conversion

    Yes. Not losing any FC overnight since Thursday, CC's have been at or near 0, as well. I added enough CYA (100 oz) on Friday to get to 30, but didn't test for it until Monday, to wait for it to completely disolve. Test indicated CYA around 20. Should I add enough (33 oz per PoolMath) to get it up to 30? Also, should I care about borates?

    - - - Updated - - -

    One other thing, I have a slide. Would just turning water on to slide provide aeration to raise ph a little?
    Tim
    25k IG vinyl Hayward 1HP Superpump Hayward S200 sand filter

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