• Check out the NEW HASA Liquid Feeder: The Easy and Economical way to get HASA liquid sodium hypochlorite into your swimming pool. See it here!.

PCTI Certification

Grow your business and the value to your customer.

Gain premier training and certification through the Pool Chemistry Training Institute instructional program, sponsored by HASA!

PCTI Residential Pool Certification Class:

Saturday June 10, 2023
8:00am-4:00pm CST


  • IPSSA member discount and education reimbursement available
  • Certification Patch
  • Certificate of Achievement
  • Listing as Certified Technician on PCTI website
  • Ultimate Pool Tools discount coupon

Register Now

Invest in Yourself and Your Business with PCTI

Become certified by PCTI with a one day Pool Chemistry Certified Residential Course. These 8 hours may be your best use of time to improve the quality of your business and help you justify stronger service rates.  The class is interesting and informative.   Once you pass, you will receive:

  • Certification Patch (valid for 3 years)
  • Certificate of Achievement
  • Listing as Certified Technician on PCTI website

Mobile Testing Apps

Pool pH Adjustment Tool

Pool Chemical Dose Calculator

Pool Drain Percent Calculator

Pool Borate Start Up Calculator

Pool pH Adjustment Tool

The pH – Alkalinity Adjustment Tool is an incredibly accurate tool for adjusting pH and total alkalinity up or down in swimming pools. In the past, you had four choices for making adjustments to pH and alkalinity:

  • Guess an amount of chemical to add, wait for thorough mixing and retest the water in 1-4 hours to see what it did
  • Make an Acid or Base Demand Test to determine the amount of acid or base by counting drops, looking up the amount in a table, and then adding it. But this only makes the pH 7.5 and does not tell you what the new alkalinity will be after the addition
  • Calculate the amount of alkalinity increase or decrease, add the chemical dose, wait for mixing, and then see what the new pH is
  • Use an app or water analyzer that supposedly gives correct chemical amounts but only gives an amount for pH or alkalinity adjustment

None of these methods are acceptable or accurate and they require waiting and retesting.

Now with the pH – Alkalinity Adjustment Tool, just input the pool volume and water conditions and it calculates the exact amount of chemicals to add to reach either a Target Alkalinity (and it provides you with a new pH) or to reach a Target pH (and it provides a new Alkalinity). We call this pH Priority and Alkalinity Priority.

Pool Chemical Dose Calculator

Pool Chem Dose Calculator is a pool calculator that will calculate the exact chemical dose needed for 38 chemicals in 11 categories for any size pool in US Imperial or Metric measures.

To use it you enter the pool volume in gallons or liters, choose US Imperial or Metric, select which item you want to change from the drop down list and then enter the desired change in ppm or mg/l. Pool Chem Dose Calculator then lists all of the chemicals that can be used for that item change and the doses for each one.

Pool Drain Percent Calculator

The Pool Drain Percent Calculator is used to determine the percent or fraction of water to be drained to reach a Target for a specific condition in the water.

When is this needed? A condition in the pool is too high and you need to drain some water. However, the make up or source water also has some level or concentration of that condition in it. How do you figure out how much to drain from the pool and end up with the desired Target?

Using the Pool Drain Percent Calculator, you enter the condition in the pool water, then enter the Target or Desired level in the water—and, finally, enter the level or concentration of the condition in the source or make up water.

Pool Borate Start Up Calculator

The Borate Pool Start Up Calculator was developed by expert chemist, Robert Lowry primarily for professional service technicians for starting up a new plaster, quartz, exposed aggregate, pebble, or cementitious pool surface, but it can also be used for any pool surface including vinyl, fiberglass, acrylic, polyethylene, or stainless steel.

The Borate Pool Startup Calculator is a step-by-step, 7-day procedure for starting up a new pool or a recently remodeled pool that calculates a chemical dose for each of the steps for each day based on water pool volume, water tests made each day before chemicals are added and compared to Target values. Exact chemical doses are given. It also provides a record of all chemicals used, amounts added, the order of addition, and date of completion for future reference.

HASA and PCTI: Bringing advanced training and certifications to the Pool Pro community to help you grow your business.

Want Easy Access to Water Chemistry Testing Tools?

Pool Pros: Are you looking to up your game and increase your efficiency on the job? HASA now offers quick and easy access to testing tools & applications from Pool Chemistry Training Institute (PCTI) available through our new HASA Pro Rewards™ Mobile App.

More information and purchase deatils also available at PCTI-Testing Tools.

PCTI testing tools, pioneered by pool water treatment luminary Dr. Bob Lowry, offer simple ways for pool pros to test water chemistry and pH levels, monitor proper sanitizer dosing, and more—all while in the field.

Put the power of information in your hands out in the field!

Learn more about PCTI testing tools & gain other valuable information

Download the HASA Pro Rewards app TODAY

Get the HASA Pro Rewards App

Search under “HASA Rewards”

Visit our Mobile App Information Page for more details.

Download the HASA App

Our HASA Pro Rewards app also helps Pool Pros:

  • Earn points toward product vouchers & e-gift cards
  • Tap resources, articles and how-to videos
  • Stay abreast of the latest industry news

The more you participate, the more chances to score rewards points!

The New HASA Liquid Feeder

Use these tools and HASA Sani-Clor® premium liquid sodium hypochlorite in conjunction with our new HLF Daily Feed System

  • Easy to install
  • Simple to use/non-electrical
  • Best cost per use
  • No additional CYA or calcium
  • Feeds to maintain daily residual of chlorine
  • Dispenses liquid chlorine product up for to two weeks to extend feed cycle

Click here for details.

liquid feeder
ask terry


Email: AskTerry@HasaPool.com

Please be responsible when managing household or pool/spa cleaning supplies.

Liquid bleach like many household chemicals is for external use only—and needs to be treated with respect and used properly. Please always refer to the instructions on the packaging and on the accompanying label before using.

HASA ensures that

20 billion gallons

of Safe, Clean and Clear Water

make the world a better, healthier place for individuals,
families and businesses year-round.

HASA Safe, Clean and Clear Water

Interested in finding HASA products in your area?

Find a Dealer or Distributor

Sign-up for Member Access to HASA’s Dealer and Distributor Portal