Gary's Pool Supplies › Ontario

Pool service in Ontario, CA

From older pools in central Ontario to new builds in the south, same crew, same counter in Upland.

Get a quote in Ontario (909) 946-4393
★ GoogleSee Google reviews Since 1982In Upland C-53CSLB #1063945 CPOCertified · Insured PentairJandyHaywardWarranty center
On this route

What Ontario pools actually need.

New builds, new equipment

Newer neighborhoods in south Ontario have variable-speed pumps, automation, and salt systems. We service and repair all of it.

Summer heat

Ontario summers run hot. Chlorine burns off faster in July, so steady weekly chemistry matters.

Wind and dust

Santa Ana wind events blow dust and debris into pools across the city and load filters overnight.

Hard water

Calcium builds on tile and in salt cells. We test for it and keep pH where scale doesn't form.

What we do here

Every service, in Ontario.

Weekly pool serviceCleaning, chemistry, brushing, and netting once a week, by our own techs, on a set day. Repair and equipmentPumps, filters, heaters, salt systems, automation, and leaks. Our own repair staff. Pentair, Jandy, and Hayward warranty center. Equipment installationVariable-speed pumps, filters, heaters, salt systems, and automation, quoted with the install as one number. Commercial and HOAApartments, associations, and managed properties: per-visit pricing, chemical logs, and health-code compliance. Free water testingBring a sample to the store at 303 N Central Ave and leave with a written plan. No purchase needed. Local pool guidesHard water, Santa Ana winds, pump rules, and heaters, answered.

Serving 91761, 91762, and 91764 and the surrounding area. Routes run Monday through Saturday; your day is set after the first visit.

Commonly asked questions

Do you service new pools in Ontario?

Yes, including new-build startups, where the first month of brushing and chemistry decides how the plaster looks for years.

Do you work on automation and salt systems?

Yes. Pentair and Jandy automation, salt cells, and flow sensors, repaired or replaced.

Where do I bring a water sample?

The store at 303 N Central Ave in Upland, open seven days. Testing is free.

Customer reviews

What customers say about Gary's Pool Supplies

Recent 4- and 5-star Google reviews

Rating and review count are the totals on our Google Business Profile, including every review. Cards show recent reviews of 4 stars and up, newest first.

Google★★★★★ See Google reviews
Diann B. Google review
★★★★★
Good staff and service people. Listen to customers' concerns and respond appropriately. Efficient in answering billing questions. Solved a thorny pool issue I've been struggling with. Thanks!
View on Google
Richard F. Google review
★★★★★
Had a pool cleaner that needed service. Gary's store fixed it back to working 100 percent. Works like new. Friendly service! If you have a pool cleaner that needs repair or advice, they're here for you. Thank you!
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Danielle A. Google review
★★★★★
Customer service was prompt and friendly. Scheduling an appointment and payment was easy and fast.
View on Google
▸ View our profile on Google Profile totals synced within 24 hours; updated Sep 24, 2026.
Nearby

Other cities we serve.

Pool service in UplandOur home base. Pool service in ClaremontThe City of Trees means leaves in the pool most of the year. Pool service in Rancho CucamongaFrom Alta Loma to Etiwanda, weekly service and repairs out of our store in Upland, a few minutes west.. The whole service areaWeekly pool service, repair, and equipment installation from our store in Upland, plus free water testing at the counter, seven days a week.

Want a number for your Ontario pool?

Tell us the address and a bit about the pool. Weekly service or a repair, same crew either way.

Get a quote (909) 946-4393

Or text (760) 300-1476 for a quote. Replies in under 2 minutes.