Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 12 of 12

Thread: The rain effect

  1. Back To Top    #1

    Join Date
    Jun 2016
    Location
    Austin, TX
    Posts
    328

    The rain effect

    so I am still new to this. Have had my pool a month and this is the first time I have had significant rains. It's been raining non stop since Saturday. It's crazy how much dilution I have gotten. Is this normal? Here are my pre rain numbers:

    FC: 8
    CC: 0
    PH: 7.5
    TA: 80
    CYA: 70
    CH: 425
    Salt: 3200

    I have added a little extra bleach after the first heavy rain as it dropped my FC to 6. Keeping it above normal during the rain seemed like a good idea.

    Tonight:

    FC: 8
    CC: 0
    PH: 7.6
    TA: 50
    CH: 325
    Salt: 2600

    i haven't tested CYA because with no bright sun I am sure it would be inaccurate but I am assuming that's dropped pretty good too. Anyways. I'm adding calcium and salt and it will be fine but it is normal to have that much dilution? Just today we had between 2-4 inches. I did drain some as well.
    13k Gallon IG Pebble w/ attached Spa, AquaRite T-Cell-15 SWG, Hayward DE6020 Filter, Hayward 2 HP Pump, Hayward 400k Heater, TF-100 Kit, Pool Logger

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,078

    Re: The rain effect

    Rain doesn't have nearly the effect many people think it does. So how much rain did you get?? You don't say.

    So if your pool averages 50 inches deep and you got 2" rain, you diluted by 4%.....not enough to measure in most cases.

    That big CH change is likely some testing error in there.

    Run your pump all the time and then test when the rain stops.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Jun 2016
    Location
    Austin, TX
    Posts
    328

    Re: The rain effect

    I did. Just tested with rain stopped and pump on. We have had at least 2" a day since Saturday. Pool has overflowed too and I had to drain a couple inches. My SWG yelled at me about low salt so I am pretty sure my testing is correct. It's flooding down in Texas.
    13k Gallon IG Pebble w/ attached Spa, AquaRite T-Cell-15 SWG, Hayward DE6020 Filter, Hayward 2 HP Pump, Hayward 400k Heater, TF-100 Kit, Pool Logger

  4. Back To Top    #4

    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    Location
    NW Ohio
    Posts
    2,637

    Re: The rain effect

    Your numbers show around a 20% difference, which is not impossible if you have replaced nearly ten inches of water. Assuming that then your CYA likely dropped ~15 ppm, so you will want to test that when the clouds clear.

    Sent with Tapatalk on HTC Ten
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  5. Back To Top    #5

    Join Date
    Jun 2016
    Location
    Austin, TX
    Posts
    328

    Re: The rain effect

    It's hard to tell how much I've lost. There is a small drain tube near the top of one of my skimmers where water leaves when it gets too high. It over flowed above that the first night but not since. It's just been slowly draining out of that tube. I guess it is what it is. I'll add more cya when these storms are finally over.
    13k Gallon IG Pebble w/ attached Spa, AquaRite T-Cell-15 SWG, Hayward DE6020 Filter, Hayward 2 HP Pump, Hayward 400k Heater, TF-100 Kit, Pool Logger

  6. Back To Top    #6

    Join Date
    Dec 2014
    Location
    Santa Ana, CA
    Posts
    523

    Re: The rain effect

    Quote Originally Posted by RussellC View Post
    It's hard to tell how much I've lost. There is a small drain tube near the top of one of my skimmers where water leaves when it gets too high. It over flowed above that the first night but not since. It's just been slowly draining out of that tube. I guess it is what it is. I'll add more cya when these storms are finally over.
    What matters is how much you have now so simply run the tests after all this flooding ends. Please add name of your kit to your signature for reference.
    44k plaster pool, Pentair 011018 pump, DE6020 filter, LED lights, K2006 test kit

  7. Back To Top    #7

    Join Date
    May 2016
    Location
    Troy IL
    Posts
    465

    Re: The rain effect

    I've been on the edge of the same front that was draped through your region down in TX (my parents live west of San Antonio) and I've had my pool nearly overflow twice on me in the last 3 days. I've pumped off probably 6 inches because I don't have an overflow line. That'll definitely drop my TA, CH, CYA numbers. I haven't checked mine yet, but I expect all of my numbers to be diluted. But I'm actually happy about that.

    17,500 gallon IG Vinyl
    Pentair Tagelus TA60D Sand filter
    Pentair Challenger 1.5HP pump CFII N1 1.5A
    Taylor K-2006-A, Stenner 45MPHP10 auto chlorine feed

  8. Back To Top    #8

    Join Date
    Jun 2014
    Location
    Houston, Texas
    Posts
    447

    Re: The rain effect

    I'm in hurt mode too. We've drained our pool in the last four times this month already.

    I came home from work yesterday and the water was all the way to the top of the tiles. I drained for about 1.40 hours and got it to acceptable. So far haven't had much more than sprinkles. yay!
    19k SW IG
    Wet Edge pebble tech = new 5/16 (replaster)
    Hayward variable speed pump (new 6/17) /Shark for cleaning
    New - filled 10/18/14 - TFP 100 test kit

  9. Back To Top    #9

    Join Date
    Jun 2016
    Location
    Austin, TX
    Posts
    328

    Re: The rain effect

    We just got another ton of rain again today! Ohh well, when the sun is shining bright again, I will add CYA and and CH and see where the TA is. I don't mind it at 50 cause the fill water is so high it will probably rise on its own.
    13k Gallon IG Pebble w/ attached Spa, AquaRite T-Cell-15 SWG, Hayward DE6020 Filter, Hayward 2 HP Pump, Hayward 400k Heater, TF-100 Kit, Pool Logger

  10. Back To Top    #10
    JayBauman's Avatar
    Join Date
    Sep 2014
    Location
    Katy, TX
    Posts
    617

    Re: The rain effect

    Quote Originally Posted by RussellC View Post
    so I am still new to this. Have had my pool a month and this is the first time I have had significant rains. It's been raining non stop since Saturday. It's crazy how much dilution I have gotten. Is this normal?
    Over here on the west side of Houston, the constant rain has replaced about 10% of my pool water since Sunday afternoon, so I can imagine that you could have exchanged 25% of your water if you have been getting hit hard. My advice to you is "get used to it". Between March and May of this year, we had more total rainfall than the average depth of my pool. In May of last year, we got the equivalent of 50% of my pool in a 2-week period. 4 years ago, we had a really rainy July that threw my previous pool completely out of balance.

    They key is to make sure you anticipate the big rain storms (i.e. not get surprised) and start thinking about how you're going to manage your water chemistry before the rain starts. I now keep at least 3 bags of salt, 2 gallons of acid, a few gallons of bleach, and enough calcium and CYA on-hand to handle nearly anything that mother nature can throw at us. With a salt pool, I don't normally use bleach...so the hard part is remembering to cycle my bleach stock so it doesn't get too old.
    23' x 37' IG 18.5k gallon SWG w/ raised spa, Build Thread -->Here
    Wet Edge® Pearl Matrix®, Hayward® SwimClear™ 525 ft², Hayward® Goldline Controls® PS-8
    4x Hayward® TriStar™ pumps, Paramount PCC2000® ICS, TF-100 w/Speedstir

  11. Back To Top    #11

    Join Date
    Jun 2016
    Location
    Austin, TX
    Posts
    328

    Re: The rain effect

    Thanks for the tip. I have been mainly managing chlorine and ph fine. I have added salt and calcium as well. I will wait on cya until this round of storms is gone. I did just order a bunch of cya and calcium and now have back up salt so I think I'll be set for the next time. Thanks again for the tips.
    13k Gallon IG Pebble w/ attached Spa, AquaRite T-Cell-15 SWG, Hayward DE6020 Filter, Hayward 2 HP Pump, Hayward 400k Heater, TF-100 Kit, Pool Logger

  12. Back To Top    #12
    Surf_ox's Avatar
    Join Date
    Aug 2016
    Location
    Cypress, TX
    Posts
    40

    Re: The rain effect

    Quote Originally Posted by JayBauman View Post
    Over here on the west side of Houston, the constant rain has replaced about 10% of my pool water since Sunday afternoon, so I can imagine that you could have exchanged 25% of your water if you have been getting hit hard. My advice to you is "get used to it". Between March and May of this year, we had more total rainfall than the average depth of my pool. In May of last year, we got the equivalent of 50% of my pool in a 2-week period. 4 years ago, we had a really rainy July that threw my previous pool completely out of balance.

    They key is to make sure you anticipate the big rain storms (i.e. not get surprised) and start thinking about how you're going to manage your water chemistry before the rain starts. I now keep at least 3 bags of salt, 2 gallons of acid, a few gallons of bleach, and enough calcium and CYA on-hand to handle nearly anything that mother nature can throw at us. With a salt pool, I don't normally use bleach...so the hard part is remembering to cycle my bleach stock so it doesn't get too old.
    This spring was redonkulous.




    --------------

    Don't ever hesitate to try something new. Remember amateurs built the ARK and professionals built the TITANIC.
    13K; IG Pebble sheen [4,5,4] with sun deck; 2hp pentair cleaning the water through a Clean and Clear Plus; 2hp pentair flowing the natural rock waterfall and 3/4 hp powering the 2011 Pentair legend (AKA "THE DUDE")

Posting Permissions

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