As we expected, the number of questions we received recently about swimming pool water has definitely increased. Today’s inquiry comes from a Water Testing Blog reader who hails from Pakistan and he/she asked:

Dear Sir/Madam,
hope you will be fine.i need some information regarding digital chlorine tester for swimming pool water .i read about extech cl200 testing metre.kindly send me the literature and price for it .
thanks
an early response is appreciable
farhan

Now before any of you go and criticize this person’s grammatical skills when typing in English, think more about the person’s commitment to keeping a proper chlorine level in swimming pool and the time it took to submit a question to this site.

WE commend ‘Farhan’ for his/her efforts and for transcending the language barrier to ask a question about proper chlorine testing in pool water.

On the topic of the “Extech 1200C” for chlorine testing in pool water, we took a look at the ExTech web site and did not find a meter in the chlorine/fluoride in water detection called the ‘Extech 1200C’… so we found ourselves a bit puzzled by your question.

We DID, however, see the ExTech CL200 Chlorine Testing Meter which uses Extech (CL203) Exstik ExTab™ Chlorine Reagent Tablets, a undoubtedly a proprietary blend of DPD-1 & DPD-3 reagents, to test for ONLY total chlorine concentrations in water.

The obvious problem we see with this meter for pool water testing, despite its USEPA credentials for total chlorine testing (in waste water), deal with the meter’s INability to test for free chlorine concentrations in water.

Proper Pool Water Testing Requires Free AND Total Chlorine Testing!

That heading said it all. Proper pool water care requires both free AND total chlorine testing.

Why? Quite simply, it does little good for the sanitation of a pool to have an in-range total chlorine reading with a very low, or non-existent, free chlorine reading. When that happens the pool contains mostly, if not entirely, chloramines (aka: combined/used chlorine molecules) which possess very little (limited) oxidizing power… and limited oxidizing power means limited sanitizing capabilities.

Improperly sanitized pool water can EASILY become a home in which various bacteria, parasites and viral ‘issues’ which will flourish, breed and infect swimmers if left unchecked.

Repeated Moral of the Story

Invest in a meter that test for both total chlorine concentrations AND free chlorine concentrations.

We suggest using a meter like the eXact Micro 7+ Pool & Spa Meter because it tests for not only free AND total chlorine, but also for Total Alkalinity, Bromine, Calcium Hardness, Copper, Ozone, Permanganate, and pH… all with the same meter!

Earlier we talked about the Extech’s USEPA credentials so naturally we figure you want to know if the eXact Micro 7+ Meter has credentials, too — and it does! When used with DPD chemistry (and the appropriate procedures, of course) the meter qualifies as an EPA Compliant device for testing free an total chlorine in drinking water.

“But Wait! There’s More!” Screamed the Announcer

As an added bonus, the eXact Micro 7+ Pool Meter also has the ability to test for Ammonia, Chloride/Salt, Chlorine Dioxide, Chromium Hexavalent, Cyanuric Acid, Iodine, Iron, Low Range Total Hardness, Manganese, Nitrate, Nitrite, Acid pH, Alkali pH, Potassium, Sulfate, Sulfide, and Turbidity — when operated in ‘% Transmission’ mode with the appropriate eXact Micro 7+ Reagent Strips.

While we all would LOVE to believe swimming pool water contains no harmful bacteria, in reality many swimming pools — despite the apparent presence of chlorine odors — actually DO contain harmful bacteria.

Granted the levels of contaminants often pose no danger to swimmers, also called bathers (hence the term ‘bather load’ rather than ‘swimmer load’ when discussing a pool’s usage), but for people with compromised immune systems, the elderly and/or the extremely young these levels may pose a health risk.

In other swimming pools, however, the levels do sometimes become dangerous for the general population and waterborne bacterial and/or viral contaminants may spread from bather to bather without anyone knowing until later on when the contaminant has worked its way into bloodstreams, reproduced and starting causing stomach pains, cramping, diarrhea, etc.

Some cases of bacterial contamination by swimming pool have resulted in hospitalization and, in rare instances, even deaths.

So… Can the average person (or pool operator) perform some sort of test on their pool water that could help to determine if the pool water sanitizer has effectively killed off any potentially harmful water bacteria?

Of COURSE someone makes a test kit for bacteria in swimming pools!

The WaterSafe Rapid Bacteria Test Kit provides reliable positive/negative results for ‘popular’ pool water contaminants such as Pseudomonas, Aeromonas, E.coli, species of Salmonella, Shigella, Enterobacter, Klebsiella, and other Coliform and non-Coliform bacteria.

If you want more information on this product, you can find it on FilterWater.Com.

Although not often (these days) that we get many questions pertaining to pool water, this one question does tend to get asked at least five or six times a year: “What does cyanuric acid do for pool water?”

Honestly, cyanuric acid does more for the chlorine in your pool water than it does the pool water itself. As an element in water chlorine LOVES to more or less run wild and leave the water first chance it gets if not controlled (stabilized) by a compound like cyanuric acid.

In the absence of a chlorine stabilizing compound things like sunlight, wind and just plain chlorine’s tendency to ‘off gas’ would make it extremely difficult to maintain a free chlorine residual in pool water. Without a free chlorine residual pool water can easily turn green with algae, become cloudy and most CERTAINLY become a breeding ground for water dwelling bacteria and other pathogens.

Two forms of cyanuric acid?

Back in the day you could only get cyanuric acid as granules that you had to mix in a pail to form a slurry and pour down the skimmer (slowly!) with the pool pump running.

Now, however, you can purchase cyanuric acid as a concentrated liquid… which we can ASSURE you saves a lot of time!

Anyone who has ever had to mix, swirl, pour, mix, swirl, pour, mix, swirl, pour, etc., etc., etc., over and over again for a large pool will know EXACTLY what we mean by that last statement. Pouring too much of the cyanuric acid granules into the skimmer too quickly could result in dangerously high levels of pressure in the filter.

Given how BUSY most people get during the rest of the year, why would Summer offer them a break in their hectic routine? Therefore it definitely didn’t shock us one bit when ‘Mary12Adam’ wrote in and asked,

“My husnband and I both work 2 jobs and take turns shuffling the kids around to all their school, soccer, band and scout stuff. We don’t have time to run back and forth to the pool store every week for more pool chemicals. Do you know a chemical kit that will last us most if not all summer long?”

We certainly empathize with your situation, Mary, since we have kids, too, and have to create time to do ANYthing other than work, housework and drive them hither and yon.

We typically stock up on chemicals from our local pool supply store early in the season and don’t have to make a trip back until at least 3/4 of the way through the season, though sometimes a bit sooner if we get a lot of rain or have 2 or 20 more social gatherings at the homestead.

Since it sounds like you clearly don’t have a lot of time on your hands, Mary, for going to the pool store even ONCE, we suggest that you look into a pool chemical package like the Chemical Season Supply Kit (Large) from Amerimerc.Com, a leading online retailer of pool chemicals, pool test kits, pool supplies, and, of course, pool toys.

What does the kit contain? So glad you asked!

• 50 lb.3in Tablets — Great for day-to-day chlorinating
• 1 qt. Poly 60 Algaecide — A necessary tool for fending off unwanted algae
• 1 qt. Conquest Super Rust & Scale — Keep pesky metal stains out of your water
• 24 x 1 lb. bag Dura Shock — Excellent for shocking & superchlorinating
• 4 lb. pH Increaser — Effective way to elevate the pH of your pool water
• 6 lb. pH Reducer — Effective way to decrease the pH of your pool water
• Aqua Chek Chlorine 3-Way Test Strips — Fastest way to test your pool for vital parameters

Looking for other chemicals and supplies for your swimming pool and want them delivered right to your door? Check out the latest offerings on Amerimerc.Com!

As usual the warmer weather (in most of the US) has brought out the folks who have questions about pool water and how best to take care of it. Today’s question comes from ‘ActionLassie007′ who asked,

“Do they make meters for pool testing that regular people can afford? Last yr our poolguy had a meter and I asked him how much it cost. He told me one thousand and some change. He lie to me so I would not go get one and he loses a customer?”

Wow. Interesting situation, right? Personally we’d have fired the guy for telling an outlandish lie. Yeah, sure, SOME equipment used to test pool water MAY cost upwards of a thousand dollars or more, but would the average pool maintenance person REALLY spend that kind of money? We doubt it.

We suggest, Lassie, that you take a look at the eXact Micro 7+ Pool Water Testing Meter… which costs well under a thousand dollars, by the way.

Combining the reliability and repeatability of a photometer w/ the dependability of proven chemistry methods such as DPD (for chlorine testing) and phenol red (for pH testing), the eXact Micro 7+ Pool Testing Meter puts the power of accurate water testing into the hands of the people who need it most: pool owners.

A definite advantage offered by this particular pool meter: Versatility. The pool testing meter tests for 7 critical pool water parameters directly and with the use of a conversion chart and correct reagentstrip it can test for a number of other water parameters, as well.

What comes in pool water test kit?

In the basic kit you will find everything you need to test for free chlorine, total chlorine, pH, calcium hardness, total alkalinity, dissolved copper, and cyanuric acid.

Anyone who thinks they can just toss chlorine in their pool and walk away… will come back to a green, nasty or otherwise unusable pool — and need to spend a fair amount of money on chemicals to make the water clear (and/or safe!).

Of all the methods out there, Pool Test Strips offer the quickest and easiest testing solutions. Some people doubt the accuracy of test strips, sure, but test strips have come a LONG way in recent years.

Pool Check TDS Strips

Looking for a pool test kit w/ a bit more… chemistry to it? No problem. ‘Old School’ wet chemistry test kits that use liquids still exist. The most basic ones use OTO (for total chlorine testing) and a chemical called phenol red for pH testing.

More advanced liquid pool testing kits will use both those chemicals, maybe, and others to test for chlorine (free & total), bromine, pH, alkalinity, calcium hardness, etc. The more pool water parameters you test for, the easier a time you will have keeping your pool water clean, clear and safe!

If you catch a pool water problem early on you have an opportunity to correct it BEFORE it gets out of hand, your water turns green (or black!), and you wind up spending money on extra chlorine, extra algaecides, and possibly other things.

Each year millions of pool owners will venture out into their sheds, begin to rummage through boxes marked ‘pool stuff’ in their garages, etc. and come up empty handed. What did they go looking for? Their simple, trusted 2-way pool water test kit.

Where did all those test kits go? No one really knows, but some have hypothesized that an alien race of testing gnomes creeps out in the off season and harvests a select number of 2-way test kits that they will sacrifice to the Pool Gods on our behalf in exchange for a bountiful, fun and safe swimming season.

Regardless of whether or not that last bit sounded believable, if you find yourself in need of a 2-way pool water test kit for total chlorine and pH, sites like InTheSwim.Com and PoolCenter.Com carry those and more.

Now… if you want to take BETTER care of your pool water — and possibly save yourself numerous water chemistry headaches which cost money to correct — you may want to consider taking a look at a 4-way pool test kit or more advanced Taylor Test Kit.

Taylor K2005C Pool Water Test Kit

Back in the old days, pool water professionals had no way to determine the cause of a stain on pool liners, plumbing fixtures, steps, or stairs. They just tried every trick they could think of to remove them until they came off… IF they ever came off.

These days, however, companies like Jack’s Magic specialize in making products that allow even the most inexperienced pool operator to quickly identify stains and remove stains.

Pool owners/operators who’ve tried Jack’s Magic Stain Identification Kit say it has saved them countless hours of wasted labor (scrubbing!) by taking the guesswork out of the satin id’ing and removal process.

How does it work? Quite simply, one of four (4) simple topical tests will pinpoint the nature of the stain and the included guide then tells users which Jack’s Magic Stain Removal product will work best to remove your swimming pool stain.

Where do pool water stains come from?

Typically stains result from unwanted water contaminants such as metals (i.e. iron, copper and manganese) which find their way into pool water via the fill water used to top off or initially fill up a swimming pool. Therefore we always suggest testing fill water before adding any chemicals. This simple step can save you tons of aggravation.

Why? Because if you discover ahead of time that your pool water contains metals, you have the opportunity to add the correct sequestering compounds and metal chelating compounds before adding the sanitizers that would bind with metals, form precipitates, fall out of solution, and create stains.

Need a test kit for your pool water? Take a look at Taylor-Test-Kits.Com or the eXact Micro 7+ Pool Testing Meter.

Yesterday we posted a blog entry about pool water testing and within a few hours we had a slew of inquiries about other pool related topics. We promise to get to them all in due time… and right now we will answer ‘MillieMouse’ who asked:

“My husband never throws anything out until its totally empty and he has used the same reagents in our Taylor brand pool test kit for a few years. Is that safe?”

Thanks for writing in, Millie, and to answer your question directly, NO. You should replace Taylor and any brand of test kit’s reagents on a yearly basis or whenever they get exposed to extreme temperatures, sunlight or other things which could cause premature chemical degradation — such as getting stored in close proximity to containers filled w/ chlorine or bromine.

Since you specifically mentioned that your husband uses a Taylor Test Kit, we figured we’d point you in the right direction… if you can get him to part w/ his old reagents. See below for a list of commonly needed Taylor test kit reagents:

We hope this helps and if, by chance, your husband has accidentally misplaced his beloved (antique?) Taylor test kit and wants to get a new one, Taylor-Test-Kits.Com can help with that problem.

Although MOST of us still have snow on the ground and/or ridiculously cold temperatures outside our windows, some other folks have started to experience weather warm enough to make them start thinking about… testing their pool water.

‘TommyT’ wrote in and asked, “Due to a bad cover and probably a hole in my liner we will need to add a lot of fill water this Spring. We have a well and know we will need to shock real well come Spring, but will we need to test for things like iron or is that all a bunch of hype about iron and metals ruining pools?”

Definitely NOT a bunch of hype, Tommy. We highly suggest that anyone needing to add water to their pool from a well, or ANY source for that matter, perform a number of tests on the water BEFORE adding chlorine, bromine, etc. If present in the water, minerals like iron and copper will immediately get oxidized by sanitizers ‘drop out of solution’. When that happens, they land on pool fittings, liners, steps/stairs, etc. and could leave permanent stains!

Yeah, sure, we would still suggest adding products like Sea Klear Metal Klear or Jack’s Magic Pink Stuff even after testing, but the testing will let you know if you need a lot of those products or just a normal maintenance dose.

Trust us when we say that the time and money spent testing the water before shocking does not compare to the amount of time and money wasted when people have to clean up stains caused by metals in their pool water!