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 September 24, 2013 at 8:46am

Here is the Last Months Data:  I want to make the following points clear:

  • Chloramines went down from 1.5ppm to 0.8 ppm.
  • Water Quality improved
  • Air Quality improved.

We Believe that there is a relationship between the Alkalinity of a swimming pool, to the ability for Breakpoint to occur.  The pool was testing 230 - 140 ppm during the second phase of the trial.  

After the trial, the pool was drained, refilled, and restarted (as part of an annual maintenance.  I am being told by the Y that the pool's chloramine levels are non existent since the refilling of the pool.  The current Alk Level is 80 ppm.  

The water clarity improved tenfold, and to the surprise of the people at Chemtrac, who have been taking samples from pools all over the country over the past year.  The YMCA Scored the best particle counts in its Category (High Rate Sand Filters), and even beat out some Vacuum DE systems.  It even beat out the particle counts on an Olympic pool using a Regenerative Filtration System! - BETTER SANITATION does improve water clarity...

If you have any questions about the trial, or if you would be interested in a trial on YOUR pool - Let me know.

Look out for our next Study - "ORP vs. TRUE PPM Control" - settling the debate over ORP control and Amperometric control...

Comment by Clemente J. Rivera on August 30, 2013 at 12:42pm

Study is over.  Controller Datalogs pulled, and final results to be published shortly.

Comment by Clemente J. Rivera on August 26, 2013 at 11:31am


FC: 2.20 / TC: 3.05 / CAC .85 / pH 7.334

Chloramine reduction is occurring...I just cant guarantee that the reductions we want to see will occur in the last 4 days of this study.

Alkalinity continues to drop, as we are still on acid feed.

Your comments are appreciated.

Comment by Clemente J. Rivera on August 20, 2013 at 7:09pm

Hi Everyone - As we rapidly approach our deadline, I just wanted to point out todays morning readings:

Today: FC: 2.00 / TC: 2.93 / CAC: 0.93 / pH: 7.329

On 8/9/2013, the reading looked more like: FC: 1.77 \ TC: 2.86 \ CAC: 1.09 \ pH 7.310

Ill keep you posted as we continue to lower alkalinity via pH Acid Feed.

Comment by Robert Burrows on August 15, 2013 at 11:20am

All good! Excited to see post adjustment data.

Comment by Clemente J. Rivera on August 15, 2013 at 8:30am

Adjustments made since Friday Data Pull:

  1. Chlorine feed adusted to 30 ppm per hour feed (0.8 gpm)
  2. New tweaks on ORP feed
  3. Acid Feed is enabled, with a full complement of Acid to continue feed to reduce Alkalinity from 230 ppm to 80-100 ppm range.

Your questions & Comments are appreciated...

Comment by Clemente J. Rivera on August 15, 2013 at 8:26am

Here are your July Readings...

We installed the Solution on 7/19, so the craziness was from manually feeding during that install.

Here is another copy of the MAY/June Readings, for your review:

Your comments are appreciated:

Adjustemnts have been made to try to get chloramines down.  Alkalinity is high in this pool (230ppm)... The Operator did not prepare with a full compliment of Acid stock for the trial, so we shipped 12 cases today.  As of yesterday, they started running acid, and we are waiting to see if Chloramines get affected as Alkalinity starts to drop.  Keep you posted.

Comment by Clemente J. Rivera on August 3, 2013 at 10:18am

So, the first data pull for phase two was taken yesterday.

I will have the graphs out shortly.

From the data, I can tell you the following:

  • Water quality has shown an improvement based on particle counts, even members have noticed a difference.
  • readings are steadier, and less drop off (except for some moments where the acid feed was left empty and it affected pH and ppm readings)
  • Chlormines have NOT been reduced, although the air quality has improved a bit.

I decided to raise the feed rate to 20 ppm/hr.  the chlorinator is now set for 0.52 gpm, while the CO2 feed was increased to 80 scfh, because we were not getting to absolute setpoint.

Data log graphs to come shortly.

Comment by Clemente J. Rivera on July 26, 2013 at 8:58am

Something for you controller experts to mull over...

ORP/pH  steady, but PPM is slowly dropping...

Care to guess?

Robert Burrows - Care to enlighten? (gotta make your answer rhyme)

Comment by Clemente J. Rivera on July 26, 2013 at 3:14am

Drumroll Please...

First week's Data logs to be published shortly.

From a quick glance at data logs - I noticed Particle counts are showing promise - low counts mean improved clarity...

Also - Increased chlorinator flow from 0.2 gpm, to 0.25 gpm. (7.6 - 10 ppm per hour)

will week one of Phase 2 show chloramine data we are looking for?  Keep you posted...

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