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.
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37+
Years Serving MN
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10x
Readers Choice Winner
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BioGuard
Certified Dealer
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Images are AI generated and do not depict an actual pool or Dolphin Pool & Spa location.
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.
Openings & Closings
A proper opening sets up your whole season. A proper closing protects everything you've invested. Don't cut corners on either.
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Spring
Pool Opening
Includes equipment startup, reconnecting returns & skimmers, cover removal & storage (where applicable), and initial water check. |
Fall
Pool Closing
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.
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.
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.
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Standard Sand
20–40
micron filtration
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→
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Micron1 Glass Media
1
micron filtration
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We also carry ZeoSand and RubySand — ask our team which upgrade is right for your filter and budget.
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 |
Frequently Asked Questions
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.
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.
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.
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.
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.
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.
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.
3405 Hwy 169 N, Plymouth MN 55441 · dolphinpool-spa.com
Your Happy Dolphin Pool & Spa Team
3405 Hwy 169 N, Plymouth MN · 763-542-9000 · dolphinpool-spa.com