At the Wayne YMCA in Wayne, NJ, efforts to prove a "Simple Truth" about Chlorination and Chloramine reduction are underway.  This High Use Aquatic Facility (Its a YMCA Pool, remember?) is being scrutinized over the next 60 days to track Free & Total Chlorine, ORP and pH readings, as well as Particle Counter readings to gauge filtration efficiency.  

For the first 30 days, it will be operating with its current Water Quality Control system:

  • A Link Automation Model 1100 Controller
  • Stenner 85M5 Pump
  • CO2 Feed Unit.

After the first 30 days, a High Capacity Feed Chlorination System (Model HCF-Feed5, seen below) will be installed by Treatment Specialties of Ramsey, NJ. It is comprised of:

The purpose of these changes is to upgrade the Feed System to coincide with a recently developed specification for High Capacity Feed Chlorination.  A pH Feeder Switch will also be utilized to easily switch from CO2 to Acid feed, as Alkalinity Levels fluctuate.

The same parameters will be measured for the remaining 30 days after the installation.

The goal of this study is to collect data that proves that the HCF specification can:

  1. Lower Chloramines in a pool, without the need to superchlorinate (does this mean I don't need to buy an expensive UV system?)
  2. Maintain Consistent Levels of ORP through a period of time, no matter the kind of bather demand its given (in this case, a heavily used YMCA Pool with Chloramine issues)
  3. Improved pH/Alkalinity Control
  4. Improved Filtration and Water Clarity

Data collected over the 60 day period will be recorded by an additional controller, a Chemtrac HydroAct 600 Chlorine Analyzer utilizing Amperometric Free & Total Chlorine Sensors, as well as ORP and pH Sensors, and a Particle Counter to gauge any improvements in filtration and Water Clarity (A High Rate Sand Filter is used there).

I will keep you all posted as developments arise.  For more information, check out the HCF SYSTEM PAGE at the Treatment Specialties Website,

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Comment by Clemente J. Rivera on July 21, 2013 at 5:46pm

So - time to explain what all the fuss is about:

HCF stands for "HIGH CAPACITY FEED" Chlorination.  What we are simply doing is upgrading our feed rate to introduce a large shot of chlorine into the return line - The return line acts like a contact chamber, to give us the CT needed to reach instant Breakpoint.  The shots are short, and are dictated by the controller's programming.

So - How much chlorine are we feeding here?  The Wayne YMCA is set for 0.2 gpm - Thats 288 Gallons Per Day (GPD) (thats 3 times more chlorine per day as the previous Stenner Pump Installation).  At that rate - the return line will be introduced with enough chlorine to raise it to about 65ppm chlorine.  At that concentration - pH can be ignored, and Breakpoint chlorination is achieved.  This is known as "Shock in the pipe" - a previous term used by a Cal Hypo Manufacturer to describe how they maintain water quality using their 1% solution of cal hypo (it failed - because their data showed a concentration of 15-20 ppm, with a pH of about that concentration, the pH lowers the ORP value for that ppm concentration, and it could never achieve Breakpoint).

The short shots of high concentration of HOCL are introduced into the pool more efficiently, and giving the controller quicker responses to ORP.  With these parameters set - OPTIMAL Chlorination is achieved.  Why dont we overfeed?  The controller is designed to lower feed times as the controller reaches setpoint (commonly known as proportional feed).  The Link Controller, however, has proprietary Proportional programming specially designed for HCF feeding.  The controller will flawlessly maintain setpoint, no matter the bather load (HCF requires a deviation of no more than 1mV of setpoint).

With that kind of performance, what can we expect?

  1. Incredible improvements in water quality - Particle counter will track clarity.
  2. Improved air quality - Total chlorine will go down, and reach equilibrium within 0.2 ppm or less.
  3. Higher ORP will be maintained, showing that our chlorine is working better.
  4. Reduced chlorine consumption - Improved ORP over next 30 days will yield very little operation of the chlorinator, improving the chlorine consumption.
  5. Reduced bather complaints - increased praises over water quality - I have received emails where end users compare the improved clarity to that of an OZONE pool...

Think about the last point - OZONE like water quality, without secondary Sanitation?

Seeing is believing, as we start collecting the data and reporting it to you...

If you have any questions on this study, please feel free to enter your comments/questions, and I will be glad to answer them.

Comment by Clemente J. Rivera on July 20, 2013 at 11:12am

and for those who havent seen it yet - this is the chemtrac unit monitoring the pool...

Comment by Clemente J. Rivera on July 20, 2013 at 11:10am

Hi all:

Pics of the HCF Installation completed yesterday...Enjoy!  Please comment!

Comment by Clemente J. Rivera on July 17, 2013 at 12:42pm

Tomorrows the Day!  Look out for Photos of the installation, and a startup Video!

Comment by Clemente J. Rivera on July 14, 2013 at 6:50pm

Phase 2 of my Study will commence this week.  The ANTICIPATION!


This pool is getting a Makeover!

Comment by Clemente J. Rivera on July 8, 2013 at 7:33pm

Tell me what you think - Vote on LinkedIn and tell us what you think is going to be the outcome of this study?

Comment by Clemente J. Rivera on July 6, 2013 at 10:53am

So...The Tablet Test Kit controversy showed its face again...

Tuesday, the Pool manager calls me telling me he has a HIGH chlorine reading.., That prompted a visit, due to the fact that the Chemtrac was reading 2.0 ppm at the time.

When I get there, I test the water with the Palintest Kit - dead on with the Chemtrac's ppm reading (True PPM ROCKS!)

I asked the Operator to test with his kit - HE GETS A HIGH READING!  I retest with his kit, and again, HIGH...Palintest retest - in sync with Chemtrac...

grab another strip of test tablets...guess what...readings now in line with chemtrac and Palintest...

Any guess as to what caused this?  Test Tabs were white, like they should be.  Expiration Date was 1/2014.  Interesting situation...Operator knows now to retest is readings are off.

Comment by Clemente J. Rivera on July 1, 2013 at 6:31pm

Hi everyone - AS PROMISED - Here are two graphs:

This graph shows the full spectrum of ORP/pH/Free Cl/Total Cl.  As you can see, three events occured:

  • ORP control failure due to Bad DPD result (5/21 - 5/28)
  • DOH Closing of the pool to super shock (6/6 - 6/15)
  • Ran out of Chlorine in tank (6/21 - 6/22)

If you remove the first two anomalies. this is what you get:

Have a look, and I welcome your comments.

Comment by Clemente J. Rivera on June 29, 2013 at 3:41pm

Data Uploaded and will be scrutinized - look out for the next graphical early next week...just in time for the holiday!

What I can tell you is that the chloramines built up rather quickly; we are back to a solid 1.0 ppm combined chlorine level.

pH and orp levels continue to remain steady (setpoints are 7.4 pH, with an ORP of 839mV, but free/total chlorine levels continue to fluctuate.  again, this is a normal occurrence with ORP control in a heavily used facility.

July 15th - HCF Install - SAVE THE DATE!

Comment by Clemente J. Rivera on June 26, 2013 at 4:49pm

I appreciate the overwhelming response to our attempt at busting the simple truth about chloramine control...PLEASE BE PATIENT...July 15th will come really fast, and you will soon see the true power of Bleach Chlorination.

Look out for latest readings shortly!

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