Skip to main content

Dolphin Pool & Spa
Plymouth, Minnesota · Serving the Twin Cities Since 1988

Expert Pool & Spa
Service You Can Trust.

From spring openings to equipment repair, water chemistry to filter upgrades — we've been taking care of Twin Cities pools and spas for over 37 years. When you call Dolphin, the job gets done right.

37+
Years Serving MN
10x
Readers Choice Winner
BioGuard
Certified Dealer
Call to Schedule — 763-542-9000

Images are AI generated and do not depict an actual pool or Dolphin Pool & Spa location.

✅ Our Trip Charge Policy — No Surprises

We charge a one-time $79.99 trip fee on initial service visits.

That fee does not apply to ongoing scheduled cleanings, and it does not apply if we need a second visit to finish a repair — for example, if we have to order a part to complete a heater repair, that follow-up trip is on us. We think that's just the right way to do business.

Seasonal Services

Openings & Closings

A proper opening sets up your whole season. A proper closing protects everything you've invested. Don't cut corners on either.

Spring
Pool Opening
No Cover $259.99
Mesh Cover $359.99
Bag / Solid Cover $599.99

Includes equipment startup, reconnecting returns & skimmers, cover removal & storage (where applicable), and initial water check.

Fall
Pool Closing
No Cover $285.00
Mesh Cover $385.00
Bag / Solid Cover $429.99

Includes blowing out lines, plugging returns, and installing your cover. Done right = easier spring.

⚠️ Minnesota winters are brutal on pool plumbing. Skipping a proper winterization is one of the top causes of cracked pipes and costly spring repairs. Don't risk it — let our team close it right the first time.

What We Do

Common Service Pricing

We believe in being upfront about pricing. Here's what you can expect for our most frequently requested services.

Service Price Notes
Sand Filter Media Change $389.99 Includes labor + standard sand. Ask us about upgrading to ZeoSand, RubySand, or Micron1 — see below.
Pump Replacement Starting at $219.99 Labor only. Pump and misc plumbing are extra.
Pool Cleaning & Vacuuming Starting at $119.99 Pool only. Pool + spa combo starting at $134.99. No trip charge on scheduled routes.
Cartridge Filter Cleaning Starting at $29.99 Per cartridge. Drop your filter off at our Plymouth store — we clean it here for best results.
Heater Diagnostics $139.99 Flat diagnostic fee. Repair quote provided on-site. If we need to return for a part, no second trip charge.
Service Trip Charge $79.99 One-time fee on initial on-site visits. Never charged on scheduled cleanings or follow-up repair trips.

Prices are subject to change. Call us at 763-542-9000 for a custom quote on your specific equipment or situation.

Featured Upgrade

Stop Filtering at 20 Microns.
Start Filtering at 1.

When we change your sand filter media, you don't have to go back to the same old sand. Ask about upgrading to Micron1 — a premium recycled glass filtration media that transforms your existing sand filter into a high-performance filtration system.

Standard Sand
20–40
micron filtration
  • Fine debris passes through
  • Weekly backwashing required
  • Efficiency drops after 3–5 years
→
Micron1 Glass Media
1
micron filtration
  • Dramatically clearer water
  • Resists bacterial growth in filter
  • Less backwashing, saves water & chemicals
  • Made from recycled glass
  • Drop-in replacement — no new equipment

We also carry ZeoSand and RubySand — ask our team which upgrade is right for your filter and budget.

Ask About Media Upgrades — 763-542-9000
Water Chemistry

Free Water Testing In-Store

Bring a water sample to our Plymouth store and we'll test it for free with $50 in chemical purchases. We'll walk you through exactly what your water needs — and because we're a BioGuard dealer, we use professional chemistry that works faster than anything you'll find at a big box store.

⚡ The BioGuard Difference: 15 Minutes vs. 4 Hours

Generic pool chemicals require up to 4 hours between doses. BioGuard only requires 15 minutes. That's not a small difference — that's your whole afternoon back.

Parameter Ideal Range BioGuard Solution
pH 7.4–7.6 Balance Pak 200 (raise) · Lo 'N Slo (lower)
Total Alkalinity 80–120 ppm Balance Pak 100 (raise) · Lo 'N Slo (lower)
Calcium Hardness 200–400 ppm Balance Pak 300
Free Chlorine 1–3 ppm Smart Sticks · Silk Tabs · Smart Shock
CYA / Stabilizer 30–50 ppm Stabilizer 100
Got Questions?

Frequently Asked Questions

How long does a pool opening or closing take?

Most openings take 1–2 hours depending on pool size and cover type. Bag/solid cover openings take a bit longer due to pumping off standing water. Closings are similar — plan for 1.5–2 hours.

Do I need to be home during the service visit?

Not necessarily. As long as we have access to the pool and equipment, most visits can be completed without you there. We'll call if we find something that needs your input or approval.

When should I open my pool in Minnesota?

Once nighttime temps are consistently above freezing — typically mid-April through May in the Twin Cities. Opening early also gives algae less time to get a foothold while the water is warming up. Call early — our spring schedule fills up fast.

What if you need to come back to finish a repair?

If we need to order a part or make a follow-up visit to complete a job we started, we do not charge a second trip fee. You pay the $79.99 trip charge once — not every time we show up.

What brands of equipment do you service?

We service most major pool and spa equipment brands. Give us a call with your brand and model and we'll let you know right away if we can help — and what it's likely to cost.

Is Micron1 worth the upgrade over standard sand?

For most pools, yes — especially if water clarity matters to you. Standard sand filters at 20–40 microns; Micron1 filters down to 1 micron, which is a dramatic improvement. It also resists bacterial buildup inside the filter and can reduce how often you need to backwash. Ask our team if it's the right fit for your system.

Ready When You Are

Let's Get Your Pool Ready.

Call us to schedule service, ask about pricing, or bring in a water sample for a free test. We're here Mon–Thurs 8–5, Fri 8–6, and Sat 8–4.

Call Us Now — 763-542-9000

3405 Hwy 169 N, Plymouth MN 55441  ·  dolphinpool-spa.com

Dolphin Pool & Spa

Your Happy Dolphin Pool & Spa Team

3405 Hwy 169 N, Plymouth MN  ·  763-542-9000  ·  dolphinpool-spa.com