Commercial Aquarium Maintenance
Restaurants and hotels pay monthly to keep fish alive. Forever.
Commercial aquarium maintenance companies design, install, and service saltwater and freshwater aquariums for restaurants, hotels, dental offices, lobbies, and high-end residences. Once installed, clients pay $200–$1,500/month per tank for cleaning, water testing, livestock replacement, and repairs — indefinitely. It's a recurring-revenue service route with virtually zero client churn once the tank becomes part of the décor.
Avg Revenue
$220K
Profit Margin
42%
Acquisition Multiple
2x - 3x
Startup Cost
$10K - $50K
Difficulty
3/5
How It Works
Operators land commercial contracts with restaurants, hotels, or medical offices, then install custom aquariums (often reselling the tank at markup). Monthly service agreements cover water changes, algae removal, filter maintenance, water chemistry testing, and fish replacement. A single technician can manage 20–30 accounts per week. Revenue per account: $250–$800/month. New installs generate $5K–$25K upfront plus the recurring tail.
Revenue Range
Real Acquisitions in This Category
SBA 7(a) change-of-ownership loans · NAICS 561790 · Other Services to Buildings and Dwellings
Deal Size Distribution
Deal Flow Over Time
Financing Profile
Recent Comparable Deals
| Closed | State | Loan | Implied deal | Jobs | Franchise |
|---|---|---|---|---|---|
| Dec 2025 | IL | $3.0M | $3.5M | 24 | — |
| Nov 2025 | MN | $75K | $88K | 2 | — |
| Nov 2025 | OH | $3.2M | $3.8M | 21 | — |
| Nov 2025 | OH | $125K | $147K | 21 | — |
| Sep 2025 | FL | $285K | $335K | 4 | — |
| Sep 2025 | MA | $250K | $294K | — | — |
| Aug 2025 | TN | $305K | $359K | 2 | — |
| Aug 2025 | OH | $865K | $1.0M | 4 | — |
| Aug 2025 | UT | $350K | $412K | 4 | Painter1 |
| Jul 2025 | WI | $1.3M | $1.5M | 25 | — |
Source: SBA 7(a) FOIA dataset, filtered to acquisitions (loans where business age is "Change of Ownership"). Implied deal size assumes an 85% loan-to-purchase ratio, a common SBA change-of-ownership structure. Charge-off rate shown only when 10+ loans have resolved (paid in full or charged off). Interest rates reflect last 24 months only. Actual deal values vary with equity injections, seller financing, and working capital terms.
Pros
- +Recurring monthly revenue — accounts rarely cancel once a tank is embedded in the space
- +Virtually no competition: few operators, low awareness, high skill barrier deters copycats
- +Owners often work 3–4 days/week once a route is established
- +High-end clients (restaurants, hotels, doctors) pay reliably and upgrade tanks over time
Cons
- -Livestock losses are client-facing and emotional — dead fish erode trust fast
- -Saltwater expertise takes 6–12 months to develop; mistakes are expensive
- -Geographic constraint: you can only service tanks within a few hours of your base
Best For
Aquarium hobbyists or biology-minded operators who want a recurring-revenue route business with no digital competition
Operating Costs
Primary costs: fish/livestock (10–15% of revenue), chemicals and supplies (8%), transportation, and part-time labor for growth. No storefront needed — pure route-based model.
SBA Financing Estimator
Adjust the deal — see if it cash flows after debt service
Estimates only. Excludes owner compensation, capex, working capital draws, and taxes. Margin assumes average occupancy and volume. Actual SBA terms vary by lender and borrower profile.
Where to Buy
Occasional listings for established aquarium service routes with commercial accounts
Business structure and startup guidance for aquarium maintenance operators
Acquisition Score
Scores margin (30), entry multiple (25), SBA market depth (20), category risk (15), and deal momentum (10). Higher = better acquisition candidate.
Quick Facts
- Category
- service
- Difficulty
- 3/5
- Buy price
- $440K–$660K
Buyer's Toolkit
Essential tools to get started
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Largest business-for-sale marketplace in the US
SBA loans and business acquisition financing — get funded fast
ROBS financing — use retirement funds to buy a business tax-free
Bookkeeping for small business owners — hands-off financials
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