Aquarium Guides · Holy Grail FC
How Much Does a Custom Aquarium Cost? 125–700 Gallon Prices
Most custom tank builders make you ask for a quote. We publish our prices. Here’s what a large custom acrylic aquarium really costs, and what else to budget for.
Key takeaways
- Tank prices: our standard sizes start at $1,240 (about 130–150 gallons) and run to $6,920 (about 530–550 gallons).
- Gallons aren’t everything: shape, height and options move the price as much as volume does.
- Freight is extra: typically $1,250–$2,500, quoted separately for every order.
- Budget the whole system: stand, sump, lids, overflow, lighting and pumps add up.
- Pay over time: Klarna and Afterpay financing are available at checkout.
Real numbers
Custom Acrylic Aquarium Prices by Size
These are real starting prices from our price list for the tank only. Every tank is still built to order for you.
| Length | Example size (L × W × H) | Approx. gallons | Tank price |
|---|---|---|---|
| 4 ft | 48″ × 24″ × 30″ | 130–150 | $1,260 |
| 6 ft | 72″ × 24″ × 24″ | 160–180 | $1,310 |
| 6 ft | 72″ × 36″ × 30″ | 317–337 | $2,760 |
| 8 ft | 96″ × 24″ × 24″ | 219–239 | $2,160 |
| 8 ft | 96″ × 36″ × 30″ | 429–449 | $5,590 |
| 10 ft | 120″ × 30″ × 30″ | 448–468 | $4,790 |
| 10 ft | 120″ × 36″ × 36″ | 653–673 | $5,040 |
| 12 ft | 144″ × 36″ × 30″ | 653–673 | $5,400 |
Prices shown are tank-only starting prices at the time of writing. Tax is added where applicable. The price list always has the current number.
Quick budget check
Price Ranges by Gallons
- 125–200 gallons: about $1,240–$1,860 for the tank.
- 200–400 gallons: about $1,530–$5,060, depending on length and height.
- 400–600 gallons: about $3,120–$6,920.
- 600–700 gallons: about $4,560–$5,400 on our current standard sizes.
- Over 700 gallons or odd sizes: quoted individually through a project inquiry.
Behind the number
What Drives the Price of a Custom Tank?
Size and height
- More acrylic: longer, wider tanks simply use more material.
- Taller panels: water pressure rises with depth, so tall tanks need thicker acrylic. See our acrylic thickness guide.
- Same gallons, different price: two tanks of similar volume can differ by thousands depending on their proportions.
Shape and options
- Specialty shapes: racetrack, bullnose, corner and pentagon tanks cost more because curved panels are heat-formed and fitted by hand.
- Overflow box: $540, placed on the left wall, middle back or right wall.
- Recessed lids: $225 for 6 ft, $350 for 8 ft and $425 for 10 ft tanks.
- Custom drilling: drains and returns placed exactly where your plumbing needs them, confirmed on your CAD drawings.
Pro tip
Compare price per footprint, not just price per gallon. A longer, shallower tank is often easier to light and maintain than a deep one with the same volume.
No surprises
The Full Budget: What’s In and What’s Extra
Included in the tank price
- Cast acrylic build: chemically bonded (solvent-welded) seams.
- CAD drawings: approved by you before production.
- Warranty: our 15-year no-leak warranty.
Budget separately
- Freight: typically $1,250–$2,500, quoted and invoiced separately.
- Stand and sump: custom turnkey builds are quoted per project.
- Equipment: lighting, pumps, heaters, filtration and water.
- Your room: floor support, power and any install help.
Sample budget: an 8 ft, 450-gallon reef tank
- Tank: 96″ × 36″ × 30″ at $5,590.
- Overflow box: $540.
- 8 ft recessed lid: $350.
- Freight: $1,250–$2,500 depending on your location.
- Subtotal: about $7,730–$8,980 before tax, stand, sump and equipment.
Smart spending
How to Get the Most Tank for Your Money
- Start standard: a standard size costs less to quote and design than a one-off.
- Go rectangular: a rectangle costs less than a curved shape of the same volume.
- Plan the system once: designing tank, stand and sump together avoids costly rework.
- Think long term: a tank that leaks in a few years costs far more than the price gap you saved.
- Spread it out: Klarna and Afterpay financing at checkout. See Pay & Finance.
- Like a REEFER footprint? We build acrylic tanks in Red Sea REEFER sizes, starting at $1,320 for the tank.
The HGFC difference
Holy Grail FC posts real prices for dozens of sizes, so you can budget before you ever talk to us. Every tank is built to order in 45–65 days and backed by a 15-year no-leak warranty.
HGFC is not affiliated with or endorsed by Red Sea.
Questions
Custom Aquarium Cost FAQ
How much does a 500 gallon acrylic aquarium cost?
Our standard tanks of roughly 500–550 gallons run about $4,620–$6,920 for the tank, depending on dimensions. Freight, stand, sump and equipment are extra. See the price list for every size.
Is shipping included in the price?
No. Listed prices are for the tank only. Freight is quoted separately for each order and has typically run $1,250–$2,500, depending on size, weight and your location.
Why do two tanks with the same gallons cost different amounts?
Proportions matter. Taller tanks need thicker panels, and longer or wider tanks use more acrylic. Shape and options like overflows and lids also change the price.
Can I finance a custom aquarium?
Yes. Klarna and Afterpay are offered at checkout, subject to their approval. Details are on our Pay & Finance page.
Can I get a refund after ordering?
Every tank is built specifically for you, so no refunds are offered once production starts. That’s why we send CAD drawings for your approval first. Learn more in how it works.
Get a Price for Your Dream Tank
Pick a standard size or send us your dimensions for a custom quote. Or call 716-573-4319.
More reading: all aquarium guides
