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Thread: How much chlorine will I need to clean a "FL Everglade" pool

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    Water_man's Avatar
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    How much chlorine will I need to clean a "FL Everglade" pool

    Hi all, long time no see. As I mentioned in my previous post soon I'll be opening my real green swamp. I wonder if someone can help me to guesstimate how much 12% "liquid chlorine" I'll need to get in order to clean my 22 kGal pool?
    The surplus will be used by my liquidator for regular maintenance over a period of 3-4 months.
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    JasonLion's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    It is almost impossible to guess. It depends on your CYA level, how much algae there actually is, how diligent you are about adding chlorine, how much sunlight your pool gets, etc.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Mod Squad Bama Rambler's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    That's a little like asking, how big is a stick?

    I'd start with about 30 gallons and just be prepared to buy more.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: How much chlorine will I need to clean a "FL Everglade"

    Quote Originally Posted by Bama Rambler
    I'd start with about 30 gallons and just be prepared to buy more.
    I hope the truck comes with it
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    Mod Squad Bama Rambler's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    30 gallons isn't as much as you think when your shocking a seriously green pool. I helped a friend clear a pool last year and we used over 25 gallons by the time it was over. The probem with not having enough on hand is that if you have to wait to get more you're losing ground.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: How much chlorine will I need to clean a "FL Everglade"

    The probem with not having enough on hand is that if you have to wait to get more you're losing ground.
    Cha-ching!! Right on the money!! It is penny-wise and pound-foolish not to have adeqaute chlorine on hand to complete the shock process.

    Extra bleach is NEVER wasted......you simply keep putting it into the pool for routine chlorination.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: How much chlorine will I need to clean a "FL Everglade"

    When I just shocked mine back into submission, I did so with 45 gallons. That brought my FC up to 30 and killed all green. I had a beautifully milky blue pool within 24 hours and it's almost completely clear to the bottom now after 5 days running.
    Clearwater, Florida

    12,000 gallon kidney shaped gunite pool
    Pentair Whisperflo 3/4HP Pump
    Pentair CCP420 420sq/ft Cartridge Filter
    Pentair Intellibrite 5G 120V Pool Light

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    Water_man's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    Quote Originally Posted by Bama Rambler
    I helped a friend clear a pool last year and we used over 25 gallons by the time it was over. The probem with not having enough on hand is that if you have to wait to get more you're losing ground.
    What size pool was it?
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    Re: How much chlorine will I need to clean a "FL Everglade"

    Quote Originally Posted by denisbaldwin
    When I just shocked mine back into submission, I did so with 45 gallons. That brought my FC up to 30 and killed all green. I had a beautifully milky blue pool within 24 hours and it's almost completely clear to the bottom now after 5 days running.
    How did you know when to stop? When the green simply turned into blue?
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    Re: How much chlorine will I need to clean a "FL Everglade"

    How did you know when to stop?
    There is a good article in Pool School that will tell you how to shock your pool and it will teach you to know when you are finished with the process.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad Bama Rambler's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    The pool size was about 15,000 gallons but that really doesn't make a huge difference. It's all about the starting condition.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: How much chlorine will I need to clean a "FL Everglade"

    Quote Originally Posted by Water_man
    Quote Originally Posted by denisbaldwin
    When I just shocked mine back into submission, I did so with 45 gallons. That brought my FC up to 30 and killed all green. I had a beautifully milky blue pool within 24 hours and it's almost completely clear to the bottom now after 5 days running.
    How did you know when to stop? When the green simply turned into blue?
    Exactly. I dumped in something like 20 gallons first, let it flow overnight, dumped in 10 more, let it flow, rinse and repeat. I run fresh tests every morning to see where I stand before adding more. Seems to work on every pool I've tried it on.
    Clearwater, Florida

    12,000 gallon kidney shaped gunite pool
    Pentair Whisperflo 3/4HP Pump
    Pentair CCP420 420sq/ft Cartridge Filter
    Pentair Intellibrite 5G 120V Pool Light

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    Re: How much chlorine will I need to clean a "FL Everglade"

    just did an 18Kgal gunite pool with 60gal of 10.5%, went from green to clean in 3 days

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    Re: How much chlorine will I need to clean a "FL Everglade"

    The huge amount of chlorine all at once approach works especially well when the CYA level is relatively high. The CYA will buffer the chlorine and cause it to effectively be added much more slowly. The down side when you do have high CYA levels is that you are left with very high FC levels, which will take a long time to come down to something more reasonable. With CYA down around 30-50 it has some more significant disadvantages, like larger than otherwise chlorine loses to sunlight and possible corrosion and liner fading risks if you go way too far and add much more than enough chlorine.

    The rule of thumb I'm familiar with for this approach is to carefully note the color of the water. Then start adding chlorine at a slow and steady rate, pouring slowly in front of a return with the pump running. When the color of the water changes, stop adding chlorine. That means more or less any color change, usually it will be a shift from relatively green towards relatively brown.

    I much prefer the add, wait, test, repeat approach. It is a little more work, but it saves on chlorine and is just as effective.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: How much chlorine will I need to clean a "FL Everglade"

    How often should I backwash the DE filter, and should I acid-rinse it before or after the chlorine treatment?
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    Mod Squad Bama Rambler's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    I, like Jason, prefer the "test, add, wait, test, add" approach. When we first started we tested every hour and added enough chlorine to get back to shock level. Then as the algae was killed you stretch the testing and adding out as you go along until you feel you're done. Then keeping it at shock level you run the OCLT. Once you pass that, you can let the FC come back to normal or your CYA.

    You backwash the filter whenever the pressure rises enough to warrant it. Just like normal, but of course, it'll be much more often.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: How much chlorine will I need to clean a "FL Everglade"

    I just took a peek at the pool, after a long period of absence.
    The water color (I don't know if the word "water" is appropriate) is deep black and green. There's black and green algae on the walls.
    Is the suggested regimen mentioned in the previous posts still valid?
    How long would it take me to clean it?
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    JasonLion's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    It is rather unpredictable. The time it will take to clean things up depends on how much debris is in the water, how diligent you are about adding more chlorine regularly during the first phase of the cleanup, and how well your filter is working. Roughly speaking, a couple of days to a couple of weeks depending.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Water_man's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    Quote Originally Posted by JasonLion
    It is rather unpredictable. The time it will take to clean things up depends on how much debris is in the water, how diligent you are about adding more chlorine regularly during the first phase of the cleanup, and how well your filter is working. Roughly speaking, a couple of days to a couple of weeks depending.
    Does it make sense to install a second filter in series?
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    JasonLion's Avatar
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    Re: How much chlorine will I need to clean a "FL Everglade"

    Not really. If you have a second pump to go with the second filter it would help to have two systems both filtering, but it is hardly essential.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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