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Thread: Typical Chlorine Loss?

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    Typical Chlorine Loss?

    Hi, anyone have any idea on ballpark chlorine loss for 100, 90, 80 etc down to 50 CYA? Pool surface is approx 390sq ft for around 18000gal. Pool is basically uncovered so sunlight around as much as in the day. So it typically starts up around 8ish to 7pm in summer and 9 to 5pm in winter.

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    Mod Squad tim5055's Avatar
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    Re: Typical Chlorine Loss?

    On 9/8/14 you had. 30,000 gal pool that the pool store told you needed a drain/refill. Folks here told you to,get a test kit and let's really see what is going on.

    On 9/9/14 you started a new thread saying you were going to do the drain and were concerned with the structure of your pool.

    Now,you are asking about an 18,000 gal pool and wanting to know ballpark FC loss. Your question is incomplete, because your don't give a starting FC level. A pool with 50 CYA is going to loose more chlorine over the course of a day if it starts at 20 FC than if it starts at 10 because more chlorine is unbound to CYA. I'm not understanding the point of the question

    I have to ask, did you get a test kit?

    FC loss is going to vary pool to pool, day to day. That is why we say you should have your own test kit and test your water regularly. This is how you will learn the pulse of 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

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    Richard320's Avatar
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    Re: Typical Chlorine Loss?

    Too many variables. Temperature, sunlight, organic debris, swimmer load, just about anything.

    Typically, 2 to 3 ppm per day. One swim party will triple that, though. If you test and dose consistently, in about two weeks you'll know your pool's appetite.
    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!

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    BoDarville's Avatar
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    Re: Typical Chlorine Loss?

    Jarwulf:

    Welcome to the forum. These guys are giving you great advice.

    Sooner or later, you will need one of the Recommended Test Kits if you want to practice our pool maintenance process.

    Quote Originally Posted by Richard320
    If you test and dose consistently, in about two weeks you'll know your pool's appetite.
    This is the first payoff you will get from having a good test kit. Other benefits include dosing properly and not wasting chemicals, avoiding problems that plague most pool owners, and increasing the life of the pool surface and equipment.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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    Re: Typical Chlorine Loss?

    Quote Originally Posted by Jarwulf View Post
    Hi, anyone have any idea on ballpark chlorine loss for 100, 90, 80 etc down to 50 CYA? Pool surface is approx 390sq ft for around 18000gal. Pool is basically uncovered so sunlight around as much as in the day. So it typically starts up around 8ish to 7pm in summer and 9 to 5pm in winter.
    This is not a specific answer for your particular pool situation, but you may get some insight into the CYA/chlorine relationship from this thread (read posts by chem geek particularly):
    http://www.troublefreepool.com/threa...A-and-Chlorine

    Other posts in that thread are also useful, in explaining why the typical home pool operator would not want CYA up at 100, even though that high CYA level tends to lead to less daily chlorine loss. Other factors, such as regularity in adding chlorine, and the ability to SLAM algae if/when necessary, also should be considered.
    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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