… for mosquitoes unless pool owners maintain proper pool water quality. It only takes a few days for most pool water to become the perfect place for a female mosquito to drop off a few (hundred) eggs.

Culex mosquitoes lay their eggs on the surface of fresh or stagnant water. The water may be in tin cans, barrels, horse troughs, ornamental ponds, swimming pools, puddles, creeks, ditches, or marshy areas. Mosquitoes prefer water sheltered from the wind by grass and weeds.

Culex mosquitoes usually lay their eggs at night. A mosquito may lay a raft of eggs every third night during its life span.

Culex mosquitoes lay their eggs one at a time, sticking them together to form a raft of from 200- 300 eggs. A raft of eggs looks like a speck of soot floating on the water and is about 1/4 inch long and 1/8 inch wide.

Tiny mosquito larvae emerge from the eggs within 24 hours. ( source )

If pool owners keep a constant chlorine or bromine residual in their pools, mosquitoes will seek other places to lay eggs because the presence of chlorine/bromine in a body of water makes the water unusable as place for their young to hatch and develop.

So… in the interest of keeping mosquito populations down this Summer, we urge all swimming pool owners to test and maintain chlorine/bromine levels in their pools on a regular basis. It only takes a few days for some species of mosquitoes to go from eggs to full-grown bloodsuckers!

Suggested Testing Methods for Chlorine/Bromine Levels

So by simply making sure you have an adequate chlorine or bromine residual in your swimming pool, you can do a lot help reduce the number of bloodsucking mosquitoes in your neighborhood this Summer.

Need a Chlorine or Bromine Dispenser for Your Pool?

Take a look at the selection of automatic chemical feeders available from In the Swim a leading online retailer of swimming pool equipment, parts, and chemicals.

You can also get granular chlorine, chlorine sticks and calcium hypochlorite granules at In the Swim.

StaceyG from Rhode Island asked us a question recently:

Hi. Do chlorine test kits work for bromine, too?

Yes, Stacey, you can use a DPD-based chlorine test kit to detect bromine levels in water. Oh, and since you’ve asked about bromine, we will assume you want to test pool or hot tub water… so you can expect us to arrive shortly for the pool party.

Generally speaking, and as long as you follow the directions for testing chlorine in water using a DPD-based water test kit, you will simply have to multiply the results of the test by 2.25 if you have bromine in the water instead of chlorine.

In other words, if you got a reading of 1.0ppm chlorine, but the water actually contained bromine, you have a concentration of 2.25ppm bromine in the water.

That’s too much math for me! My brain hurts!

For those of you NOT interested in having to perform any sort of mathematical calculations poolside, many pool & spa test kits come with color charts/labels for both chlorine and bromine.

And then, for the folks who don’t want to do any math OR have to compare colors of liquids to a color chart or color comparator, we have meters such as the eXact Micro 7+ Pool/Spa Testing Meter which takes ALL the guesswork out of chlorine and bromine testing!

Last we checked, the eXact Micro 7+ Pool/Spa Testing Meter qualified for free shipping at FilterWater.Com.

Kyle from Florida asked,

My company does a lot of plumbing work for residential and commercial customers. Not all the time, but many times we get asked to test the water once we finish a job. I see a lot of test kits that use drops and those test strips on the market, but I want to use something a bit more professional like a meter of some sort. All the meters I’ve seen out there that test for a bunch of parameters have a ton of buttons, vials, powders and an instruction manual you could use to knock out a cow. Do they make a multipurpose water testing meter for the simple guy? Thanks for your help and I love the site. Lot of good info here!

Stop it, Kyle, before you make us blush!

To answer your question directly, yes you can find a reliable water testing meter made for the ‘simple guy’ and no you will not have to attend night school just to figure out how it works.

The eXact Micro 7+ Water Testing Meter offers extreme versatility, has only one button to worry about, does not use vials, and comes with a handy, compact manual barely capable of killing a fly.

Below you will see a quick demonstration of how easily you can test water:

Now Kyle, if that looked like too much work, or like it involved way too much ‘technical stuff’, then you may as well hang up your water testing hat(?) and send all your samples out to a place like National Testing Labs ‘cuz testing water in the field does not get any easier than it does with the eXact Micro 7+ Water Testing Meter.

• Direct read parameters — Total Alkalinity, Bromine, Calcium Hardness, Free Chlorine, Total Chlorine, Copper, Ozone, Permanganate, and pH

• Additional parameters — Ammonia, Chloride (as NaCl), Chlorine Dioxide (DPD-1), Chromium Hexavalent, Cyanuric Acid, Fluoride, Hydrazine, Hydrogen Peroxide (Low, Mid and High Range), Iodine (DPD-1), Iron (Fe+2), Total Iron (Fe+2/Fe+3), LR Total Hardness (as CaCO3), Magnesium, Manganese, Nitrate (as NO3), Nitrite (as NO2), pH (Acid and Alkali), Potassium, Protein (as BSA), Sulfate, Sulfide, and Turbidity. Kit includes conversion chart for these parameters.

• USEPA Compliant meter for Free & Total Chlorine — 0.01 ppm (mg/L) precision

• Built-in, permanent cell — no loose glass or plastic cells to lose

• Easy fill testing — Simply fill or dip meter into water

• Automatic countdown timer for accurate timing of testing

• 140 test memory — saves 20 tests per menu item

• No-slip grip housing — ideal for wet testing conditions

• Lightweight — weighs only 6 ounces w/ batteries installed

• Waterproof — IP-67 Rated and meter will float if dropped into water

• Easy-to-read LCD display — no color matching required

• Environmentally friendly — recyclable parts & uses 60% less reagents than 10mL sample tests

• CE certification

Looking for a verstile, lightweight, waterproof water quality testing meter? Need an EPA Compliant testing meter for chlorine testing?

Introducing a new photometer using a patented method and technologies that offer faster, safer, easier, and more precise water testing.
The eXact Micro 7+ offers seven modes which provide direct read capabilities for Total Alkalinity, Bromine, Calcium Hardness, Free Chlorine, Total Chlorine, Copper, Ozone, Permanganate, pH, and % Transmission – which allows for testing of an additional 17 parameters.

The eXact Micro 7+ can measure a total of up to 26 parameters and provides EPA Compliant testing method for both Free & Total Chlorine when used with DPD chemistry.

In need of replacement reagentstrip bottles for your eXact Micro 7+ Water Quality Testing Meter?

No one in their right mind would argue that testing water for drinking, use in a pool, watering crops, etc. has to happen. One might, however, argue that using test strips and liquid test kits which require the user to match colors can lead to approximations and assumptions regarding critical water parameters such as pH, chlorine/bromine/sanitizer levels, alkalinity, total hardness, heavy metals, etc.

We all know what assumptions can lead to: Making an a## out of you and me.

No one wants to get sick from dirty or polluted water so when accuracy matters most, you may want to put down the test strips and liquid test kits and opt for a verstile water testing meter such as the eXact Micro 7+ which tests for NINE critical water parameters using direct read measurements and an additional TWENTY-SEVEN other important water parameters with the use of a conversion chart.

Features of the eXact Micro 7+ Water Testing Meter:

• Tests for 36 parameters in total

• Nine direct read parameters — Total Alkalinity, Bromine, Calcium Hardness, Free Chlorine, Total Chlorine, Copper, Ozone, Permanganate, and pH

• Twenty-Seven parameters using a conversion chart: Ammonia, Chloride (as NaCl), Chlorine Dioxide (DPD-1), Chromium Hexavalent, Cyanuric Acid, Fluoride, Hydrazine, Hydrogen Peroxide (Low, Mid and High Range), Iodine (DPD-1), Iron (Fe+2), Total Iron (Fe+2/Fe+3), LR Total Hardness (as CaCO3), Magnesium, Manganese, Nitrate (as NO3), Nitrite (as NO2), pH (Acid and Alkali), Potassium, Protein (as BSA), Sulfate, Sulfide, and Turbidity

• USEPA Compliant meter for Free & Total Chlorine — 0.01 ppm (mg/L) precision

• Built-in, permanent cell — no loose glass or plastic cells to lose

• Easy fill testing — Simply fill or dip meter into water

• Automatic countdown timer for accurate timing of testing

• 140 test memory — saves 20 tests per menu item

• Incorporates eXact® Strip technology — safe & reliable reagent dispersion

• No-slip grip housing — ideal for wet testing conditions

• Lightweight — weighs only 6 ounces w/ batteries installed

• Waterproof — IP-67 Rated and meter will float if dropped into water

• Easy-to-read LCD display — no color matching required

• Environmentally friendly — recyclable parts & uses 60% less reagents than 10mL sample tests

• Proprietary optics — allows for accurate testing without cap

• CE certification

Interested in learning how this device works? Check out the image below as it takes you through the steps of how to test w/ the eXact Micro 7+ Water Testing Meter.

With all the posts we’ve written about the importance of testing chlorine levels in drinking water, we seem to have forgotten that a lot of people have test kits already and simply need replacement dpd tablets. The links below will take you to a site where you can pick up replacement dpd tablets and DPD powder for the Taylor brand of water test kits for pools and spas.

Most pool water professionals will agree that pool owners and pool maintenance staff should check the sanitizer levels (chlorine, bromine, etc.), pH, calcium hardness and total alkalinity on a regular basis.

To check those basic parameters a pool owner can use pool test strips, wet chemistry pool test kits and/or pool testing meters. Each method has its own distinct advantages and disadvantages:

While the four parameters mentioned above (sanitizer levels, pH, total alkalinity and calcium hardness) should get checked on a regular basis, pool owners should also keep a watchful eye on other pool water parameters such as cyanuric acid levels, mineral content (i.e. iron, copper, etc.), TDS (total dissolved solids), and acid/base demand.

Interested in taking your testing to the next level? Got a need for fast, accurate and very versatile water testing meter system that won’t break your budget? Take a quick look at the eXact Micro 7+ Standard Photometer Kit and you may very well find what you seek.

Making use of the reliable and quite convenient reagentstrip delivery system for many of its tests, the eXact Micro 7+ Standard Photometer Kit greatly reduces testing times without affecting the quality of its water test results.

The new eXact Micro 7+ Standard Photometer Kit from Industrial Test Systems offers homeowners and water quality professionals the ability to test for 26 different parameters to ensure their water is safe and suitable for a variety of uses. Ideal for residential, commercial or municipal testing, this waterproof meter provides faster, easier and more accurate testing than strips alone can provide.

This kit comes with 25 test strips each of the following parameters: free chlorine (DPD-1), total chlorine (DPD-3), pH, bromine (DPD-1), total alkalinity, calcium and copper.

In addition to these, the following 17 parameters may also be tested through the kit’s Tr-7 transmission function (requires the use of a conversion table): 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. ( source )

OK, so we broached the topic of pool water testing and told folks to replace their reagents at the start of each new season. Now, as one would expect, folks want to know where they can get replacement reagents for their pool water test kits.

At this time we only have listing for replacement reagents to work with Taylor Pool & Spa Test Kits. We will add links to other types of reagents for other types of test kits as we locate them.

Again, we stress that pool water can cause major illnesses in children and adults if not kept properly balanced. Adding chlorine, bromine or any other sanitizer will NOT pretect you and your loved ones against infectious diseases if other pool water parameters have drifted out of recommended ranges.

As a result of a massive influx of questions related to pool & spa water testing, we have decided to branch off our normal topic of drinking water quality testing and post a few things related to testing pool & spa water. Why? Simple: Some people have not yet made the connection that bad tap or ground water stays bad whether you drink it or fill your swimming pool with it.

For most people opening their swimming pool means raising the water level off with fresh, untreated water from a garden hose or in some cases, a delivery truck. Once full of water, the testing can begin.

How Should Pool & Spa Owners Test Their Water?

Excellent question! In the ‘old’ days most pool and spa owners had a simple two-sided test kit for chlorine/ bromine and pH which looked like this:

… and each year the owners of these pool water and spa water owners made a pilgrimage to their local pool store to acquire replacement reagents for their pool and/or spa water test kits which looked like this:

While at their local pool store picking up the replacement reagents for their pool/spa water test kits, pool and spa owners would usually submit a sample of water from their freshly filled pool or spa to a smiling person behind the counter at the ‘water testing station’. Within minutes of handing over a soda can, mason jar, yogurt container or other (hopefully) sealed container full of water the same smiling water station attendant would return with a sheet of paper telling them the free chlorine, total chlorine, ph, alkalinity, total (or calcium) hardness, cyanuric acid, total dissolved solids, copper and iron levels in their water.

Can’t Pool & Spa Owners Test Their Own Water?

Of course they can. Swimming pool and spa water test kits

Then came the fun part: Picking up and paying for all the various tubs and canisters of powders and liquids that would hopefully bring their water back in line with what pool and spa water professionals consider healthy.

This seems like a good time to end today’s posting. Later we will go into the different methods a person can use to test their OWN pool or spa water: At-Home Pool & Spa Water Test Kits & Water Testing Meters and At-Home Pool & Spa Water Test Kits and Testing Supplies