In the U.S., an individual freshwater fish can cost under $1 to $40 at mass-market retailer PetSmart, while a specialist-store list dated October 2, 2026, ranged from $2.99 for a neon tetra to $79.99 for a discus. Those are retailer examples, not a national average. For a realistic budget, count the tank and equipment too: Petco’s July 2026 estimates start at about $248+ for a 10-gallon setup, plus monthly operating costs.
What do freshwater fish cost?
Fish prices depend on the species, variety, size, seller, and local availability. PetSmart says its live fish range from under $1 to $40 and recommends checking a local store for available fish. That is a broad retailer range, not a price list for each species (PetSmart live-fish FAQ).
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
|
API AQUARIUM START UP PACK Water Conditioner 1.25-Ounce Bottle 2-Pack | $6.99 | Buy on Amazon |
| 2 |
|
API TAP WATER CONDITIONER Aquarium Water Conditioner 16-Ounce Bottle | $8.48 | Buy on Amazon |
A specialist retailer’s shipment list offers specific examples. European Aquatics listed the following prices on October 2, 2026; it says the list is for in-store sales and prices may change from week to week based on size, collection location, and other factors (European Aquatics freshwater shipment list).
| Fish listed | Example price |
|---|---|
| Neon tetra | $2.99 |
| Cardinal tetra | $3.99 |
| Electric blue acara | $19.99 |
| Male betta | $29.99 |
| Discus | $79.99 |
These figures illustrate how widely prices can differ; they do not establish what the same fish costs at another store. When comparing listings, check that you are comparing the same species and variety, similar fish size, and a price for the same quantity.
#1 Best Overall
- Contains one (1) API AQUARIUM START UP PACK Water Conditioner 1.25-Ounce Bottle 2-Pack
- Makes tap water safe for fish and reduces fish stress.
- Starts aquarium cycle and allows instant addition of fish.
- Comes with two API products, STRESS COAT and QUICK START, for a healthy start-up aquarium.
- Use when starting a new aquarium, changing water, or adding fish. Add STRESS COAT first and then QUICK START.
How much does it cost to set up a freshwater aquarium?
The fish purchase is only one part of the bill. Petco’s guide, updated July 16, 2026, estimates the following ballpark startup and monthly costs for complete freshwater setups. The figures are retailer estimates, not guaranteed prices; Petco says actual costs vary by brand, region, and retailer (Petco freshwater aquarium cost guide).
| Tank size | Estimated startup total | Estimated monthly cost |
|---|---|---|
| 10 gallons | About $248+ | About $12–$15 |
| 29 gallons | About $562+ in the itemized table | About $21–$27 |
| 55 gallons | About $873+ | About $35–$44 |
The guide’s headline says a complete 29-gallon setup typically runs $600–$700, while its itemized table puts the total at about $562+. The itemized figure is a lower-bound estimate, not a promise that every setup will cost that amount.
What the startup estimate includes
Petco’s setup estimates account for initial livestock and items such as the tank, stand, lighting, filter, heater, substrate, plants or decorations, water test kit, conditioner, thermometer, net, scraper, and siphon or gravel vacuum. Its 29-gallon itemization estimates a $90 tank, $90 stand, $35 filter, $25 heater, $11 water test kit, $8 conditioner, $22 siphon or gravel vacuum, and initial fish stock at $70+.
Rank #2
- Contains one (1) API TAP WATER CONDITIONER Aquarium Water Conditioner 16-Ounce Bottle
- Neutralizes chlorine, chloramines and other chemicals to make tap water safe for fish
- Prevents tap water chemicals from causing gill destruction, tissue irritation and fish death
- Super strength, high concentration formula
- Use when adding or changing water and when adding new fish to freshwater and saltwater aquariums
What monthly costs cover
The monthly estimates include food, a share of filter-cartridge replacement, conditioner, electricity, and a medication allowance. Replacing fish or plants is variable, so it is not a fixed monthly amount.
What makes the total vary?
- Fish and variety: The specialist-store examples range from a few dollars for common tetras to tens of dollars for selected fish. Price depends on the fish offered and its size.
- Store and location: PetSmart directs shoppers to check a local store; European Aquatics’ list is a dated shipment list for in-store purchases. Confirm the current local price and availability before buying.
- Tank size and equipment: A larger aquarium has different equipment and operating needs. Brand and retailer choices also affect actual setup costs.
- Stocking plan: A listed price for one fish is not the cost of stocking an aquarium. The number of fish affects the livestock budget, while equipment and water care remain separate expenses.
How to make a useful fish and aquarium budget
- Check local listings. Look for the exact species and variety, approximate size, and whether the quoted price is for one fish or a group.
- Set the tank budget separately. Compare tank volume and the equipment included, then account for any items you still need.
- Add recurring costs. Include food, filter media, water treatment, electricity, and a reasonable allowance for medication.
- Verify before purchase. Retailer listings and shipment availability can change, so confirm the price and stock with the seller.
A Petco guide updated July 16, 2026, also gives a $546 setup estimate and $83 annual maintenance for a 29-gallon aquarium, but its cost table uses average Petco.com prices from December 2022. Treat those figures as an older comparison rather than the best current budget estimate (Petco fish ownership cost guide).
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
