What Tests Should You Do Before Hiring a New Pool Guy?

To protect yourself, you need to run a few simple "tests" before signing any contract. These aren't chemistry tests—they're checks on the company's credentials, methods, and professionalism. Here's what to look for.
Test 1: The Credentials Check

Before any service starts, ask for these three things :

CPO Certification: Ask whether the technician who will actually service your pool holds a Certified Pool Operator (CPO) credential from the Pool & Hot Tub Alliance. This proves formal training in water chemistry and equipment operation. A company owner with a CPO who sends untrained staff is a red flag .

Certificate of Insurance: Request a certificate of liability insurance (COI). If a technician is injured on your property or damages equipment during service, insurance protects you. A company that hesitates or refuses to provide one should be disqualified immediately .

License Verification: In many states, pool service work above certain dollar amounts requires a contractor's license. Ask for the license number and verify it with your state's licensing board .

Test 2: The Water Testing Method

The difference between a competent company and a corner-cutter often comes down to how they test your water .
Testing Method What It Tells You Why It Matters
Test strips only Approximate colour-match (accuracy +/- 20%) Cannot differentiate free chlorine from combined chlorine (chloramines). A strip might show adequate chlorine when the sanitizer is actually depleted and bound in ineffective form
Reagent drop kits Precise readings within 0.2 ppm Use FAS-DPD titration for chlorine, EDTA titration for calcium hardness. Provides the precision required to maintain stable chemistry and prevent plaster damage or copper heat exchanger corrosion

The test: Ask specifically, "What testing method does your technician use on-site?" If they say "test strips only," keep looking. A company unwilling to invest in a $75 reagent kit that lasts 100+ tests is cutting costs at your pool's expense .
Test 3: The Service Report

A professional company documents every visit .

Ask: "Can I see a sample service report?"

A proper report should include:

Water chemistry readings before and after treatment

Exact quantities of chemicals added

Tasks completed (skimming, brushing, vacuuming, basket emptying)

Equipment observations (filter pressure readings, unusual pump sounds, visible leaks)

Written reports create an accountability record. If your heater fails and the service never noted declining pH readings that caused corrosive water to destroy the heat exchanger, the reports (or lack thereof) become critical for warranty claims . No documentation = no accountability.
Test 4: The First Visit

The first service visit is the most telling .

What a thorough first visit includes:

Thorough inspection – The technician documents your pool size, surface type, and every piece of equipment (brand, model, age, condition). They photograph the equipment pad for records .

Comprehensive water test – A full panel, not just chlorine and pH.

Equipment check – Pump, filter, heater, salt system, automation, lights, and valves are inspected.

The actual service – Skimming, brushing, vacuuming, basket cleaning, chemical balancing.

A clear report – Digital or paper documentation of chemical levels before and after, equipment notes, and any recommendations .

If the first visit feels rushed or like a sales pitch rather than a diagnostic learning session, consider it a red flag. Pools that receive a thorough initial assessment have significantly fewer emergency service calls in the first year .
Test 5: The Red Flag Walkthrough

Before committing, watch for these warning signs :

No liability insurance. A company without it shifts liability to your homeowner's policy.

Quote without a site visit. A flat rate over the phone without seeing your pool is a guess—not a professional assessment.

"We don't test—we just add what's needed." This is the pool service equivalent of a doctor prescribing medication without examining you .

No written service reports. You'll have no record of what was actually done.

Unrealistically low prices. If someone offers full service at $75/month, they are cutting corners somewhere—and you'll pay for it later in green pools, damaged equipment, or a disappearing act mid-season .

Recommending equipment replacement on the first visit without documented evidence of failure .

Test 6: The Communication Signal

Reliability beats excellence. Homeowners forgive a slightly cloudy pool more readily than they forgive a missed visit .

Ask:

"What day of the week will my pool be serviced?" A consistent weekly window (e.g., "Tuesdays between 9 and 11 AM") signals professionalism. A "Tuesday or Wednesday" window feels unprofessional .

"How do you handle emergencies—like after a storm?" Companies with established post-storm protocols can service pools within 48–72 hours of a hurricane, preventing algae blooms that develop within 96 hours of circulation loss in summer temperatures .

"What happens if my pool turns green between visits?" A reputable company offers green pool cleanup services and emergency visits .

Final Check: The Chemistry Knowledge

If you want to test your candidate's technical knowledge, ask a simple question : "What do you check beyond chlorine and pH?"

The right answer includes total alkalinity, calcium hardness, and cyanuric acid (stabiliser) —not just the two most visible parameters. Getting these wrong can void equipment and pool surface warranties .

Your pool is an investment. Treat hiring a service like hiring someone to maintain any other valuable asset—do your homework before you hand over the keys.

And when you're ready to take control of your own pool care, Poolblue.store offers everything you need: professional-grade test kits, high-quality chemicals, and expert guidance to help you keep your water perfect—with or without a service.