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What does a 75-gallon reef tank cost to set up?
About $3,264 for a Mid-range setup, before tax and shipping. A Budget list comes to $2,892 and Premium to $4,313. Running the Mid-range list then costs about $47.11 a month. Prices are store listings we checked by hand on Oct 19, 2026 to Oct 24, 2026.
Disclosure: Links to AquaticMotiv are affiliate links, marked "Affiliate link". If you buy through one, we may earn a commission at no extra cost to you. Every other store link is a plain link that earns us nothing. Commissions never affect which products we pick, how stores are ordered or our estimates. Details.
Open this list in the planner Monthly running cost
In the planner you can edit any price, switch tiers, drop recommended items, add your tax and shipping, and compare listings store by store.
Mid-range parts list
The estimated budget is the median of the store listings we checked by hand, rounded to the dollar. Listings are actual store prices on the date shown. Amazon doesn't allow us to show its prices, so the planner links to an Amazon search for each item instead.
| Item | Our pick | Estimated budget | Store prices checked |
|---|---|---|---|
| Tank and stand | |||
| Tank Standard 75-gallon glass tank, 48 × 18 × 21 in | Marineland 75 Gallon standard glass aquarium (48 × 18 × 21 in) | $270 |
Checked Oct 24, 2026 |
| Stand Made for a 48 × 18 in tank and its filled weight (about 785 lb) | Marineland Majesty cabinet stand, 48 × 18 in | $327 |
Checked Oct 24, 2026 |
| Filtration and flow | |||
| Protein skimmer (hang-on) Hang-on skimmer rated above 75 gal (this build has no sump) | IceCap K3-100 hang-on protein skimmer | $260 |
Checked Oct 19, 2026 |
| Hang-on filter (floss and carbon) Hang-on filter rated for 75+ gal to hold filter floss and carbon | Seachem Tidal 110 hang-on filter (up to 110 gal) | $91 |
Checked Oct 24, 2026 |
| Powerheads At least 1,500 gph in total (20× volume), from 2+ pumps for even flow | AquaIllumination Nero 5 controllable powerhead, 3,000 gph × 2 | $520 ($260 each) |
Checked Oct 24, 2026 |
| Heating | |||
| Heater Adjustable, about 300 W | Eheim Jäger 300 W adjustable heater | $39 |
Checked Oct 24, 2026 |
| Heater controller Plug-in thermostat that cuts heater power if it sticks on (a heater failure can cook a reef) | Inkbird ITC-306A Wi-Fi heater controller | $56 |
Checked Oct 19, 2026 |
| Lighting | |||
| Light Reef LED covering 48 × 18 in (one 24 × 24 in fixture per 2 ft of length) | AquaIllumination Prime 16HD reef LED × 2 | $530 ($265 each) |
Checked Oct 19, 2026 |
| Substrate and rock | |||
| Dry rock About 75 lb of dry rock (≈1 lb per gal) | Marco Rocks Reef Saver dry rock, per lb × 75 lb | $300 ($4/lb) |
Checked Oct 19, 2026 |
| Sand (recommended) About 75 lb for a 1½ in aragonite bed | CaribSea Arag-Alive Special Grade reef sand, 20 lb × 4 | $136 ($34 each) |
Checked Oct 19, 2026 |
| Water | |||
| RO/DI water Pure RO/DI water for mixing salt and top-off (or buy RO water: switch below the list) | AquaFX Barracuda 4-stage RO/DI unit, 100 GPD | $208 |
Checked Oct 19, 2026 |
| Salt mix Enough for the first fill (75 gal) and early water changes | Instant Ocean Sea Salt mix, 200 gal box | $79 |
Checked Oct 19, 2026 |
| Salinity meter Reads salinity to about 1 ppt (target 35 ppt) | Store brand Seawater refractometer with ATC (store brand) | $35 |
Checked Oct 19, 2026 |
| Auto top-off (recommended) Tops off the ~0.67 gal a day that evaporates, so salinity stays put | XP Aqua Duetto 2 dual-sensor auto top-off | $169 |
Checked Oct 19, 2026 |
| Bottled bacteria (recommended) Bottled nitrifying bacteria to start the cycle | Dr. Tim's Aquatics One & Only live nitrifying bacteria (reef), 8 fl oz | $57 |
Checked Oct 24, 2026 |
| Testing | |||
| Ammonia test Ammonia test for watching the cycle | API Ammonia test kit (liquid) | $18 |
Checked Oct 19, 2026 |
| Alkalinity test Alkalinity (dKH) test | Salifert KH/alkalinity test kit | $20 |
Checked Oct 19, 2026 |
| Nitrate test Nitrate test | Salifert Nitrate test kit | $20 |
Checked Oct 19, 2026 |
| Phosphate test (recommended) Phosphate test | Salifert Phosphate test kit | $22 |
Checked Oct 19, 2026 |
| Maintenance | |||
| Siphon / water changer Siphon for water changes and cleaning the bottom | Python Pro-Clean gravel washer and siphon, X-large (2 × 24 in tube) | $20 |
Checked Oct 24, 2026 |
| Bucket Aquarium-only bucket (two: one for mixing salt water) | UNS Aquarium maintenance bucket, 5 gal × 2 | $32 ($16 each) |
Checked Oct 19, 2026 |
| Net Soft fish net | Seachem Fish net, 6 in | $4 |
Checked Oct 19, 2026 |
| Glass cleaner (recommended) Magnet glass cleaner for 75-gal glass | Gulf Stream Mag-Float glass cleaner, medium (up to 125 gal) | $44 |
Checked Oct 19, 2026 |
| Thermometer Separate thermometer to catch a failed heater | Aquatop Smart Temp digital thermometer (magnet mount) | $7 |
Checked Oct 19, 2026 |
| Total, Mid-range (24 items, before tax and shipping) | $3,264 | ||
How Budget and Premium differ
Only the items that change are shown. Everything else is the same in all three tiers.
| Item | Budget | Mid-range | Premium |
|---|---|---|---|
| Powerheads | Sicce Voyager 3 stream pump, 1,200 gph × 2 $148 | AquaIllumination Nero 5 controllable powerhead, 3,000 gph × 2 $520 | EcoTech Marine VorTech MP40mQD propeller pump × 2 $980 |
| Light | AquaIllumination Prime 16HD reef LED × 2 $530 | AquaIllumination Prime 16HD reef LED × 2 $530 | AquaIllumination Hydra 32 HD reef LED × 2 $910 |
| Salinity meter | Store brand Seawater refractometer with ATC (store brand) $35 | Store brand Seawater refractometer with ATC (store brand) $35 | Hanna Instruments HI98319 digital salinity tester $100 |
| Alkalinity test | Salifert KH/alkalinity test kit $20 | Salifert KH/alkalinity test kit $20 | Hanna Instruments HI772 alkalinity Checker (digital) $75 |
| Phosphate test | Salifert Phosphate test kit $22 | Salifert Phosphate test kit $22 | Hanna Instruments HI774 ultra-low-range phosphate Checker (digital) $75 |
| Siphon / water changer | Python Pro-Clean gravel washer and siphon, X-large (2 × 24 in tube) $20 | Python Pro-Clean gravel washer and siphon, X-large (2 × 24 in tube) $20 | Python No Spill Clean and Fill, 25 ft $56 |
| Setup total | $2,892 | $3,264 | $4,313 |
| Monthly to run | $42.14 | $47.11 | $51.83 |
Open Budget in the plannerOpen Mid-range in the plannerOpen Premium in the planner
Why some tiers reuse the Mid-range pick
- Budget, light: Same as Mid-range. We didn't find a cheaper reef LED for a 48 × 18 in tank that we could price at two stores.
- Budget, protein skimmer (hang-on): All three tiers use this skimmer: it's the cheapest hang-on skimmer we found that is rated well above 75 gal (the maker rates it to 140 gal).
- Budget, hang-on filter (floss and carbon): Same as Mid-range: the Tidal 110 was the lowest-priced hang-on filter rated above 75 gal that we found.
- Budget, auto top-off: Same as Mid-range: the cheaper Tunze Osmolator 3 Nano is rated only to 66 gal, so it's too small here.
- Premium, protein skimmer (hang-on): Same as Mid-range: the larger hang-on skimmers we checked don't skim a 75 meaningfully better.
- Premium, heater: Same as Mid-range: the controller already provides the safety cutoff.
- Premium, dry rock: Same as Mid-range: pricier rock doesn't improve the tank.
- Premium, ro/di water: Same as Mid-range: bigger units only make water faster.
- Premium, auto top-off: Same as Mid-range: the Duetto 2 already has two sensors, the main safety gain.
Budget is the cheapest reliable option that meets the requirement. Mid-range is the best balance. Premium has to add a real gain, or it reuses the Mid-range pick.
What the Mid-range list costs to run
About $47.11 a month, so the first year comes to about $3,829 including setup. That's 500 W of rated equipment (154.4 kWh a month) at 17¢ per kWh, with the light on 8 hours a day and the heater on 30% of the time, plus supplies. Food isn't included.
| Electricity | $26.25 |
| Salt | $14.62 |
| RO/DI resin and filters | $5.43 |
| Testing | $0.81 |
| Total per month | $47.11 |
The 75-gallon running-cost page works through the same tank line by line with a typical calculator setup, so its figure differs slightly from this exact list.
Is a all-in-one (AIO) reef tank cheaper?
We didn't find an all-in-one reef tank close to 75 gallons in stock at two stores we could check. The nearest were a 65-gallon JBJ AIO (in stock at one store) and Innovative Marine's NUVO INT 75, a drilled tank with stand and sump that is about $3,280 at the one store we found it, so we can't price a fair comparison yet.
Good to know
- Heavy items: the tank, stand, dry rock and sand are expensive to ship. Local pickup often saves money. Filled, a standard 75-gallon tank weighs about 785 lb, so the stand has to be made for it.
- Why there's no sump: A standard 75-gallon tank isn't drilled, so a sump would need a drilled (reef-ready) tank or a hang-on overflow, which adds flood risk. This build uses hang-on equipment instead, which a 48 × 18 in tank has room for. A reef-ready 75 with a sump is a common upgrade, but it changes most of this list.
- Water: the list includes an RO/DI unit to make your own water. If you'd rather buy RO water, the planner lets you swap it out.
- Not included: fish, coral, plants and cleanup crew; food, décor and light mounts; shipping and sales tax; electrical work, a GFCI outlet or a surge strip.
- Before you add fish: cycle the tank first, which usually takes several weeks. Test ammonia and nitrite until both read zero and nitrate starts to rise, then add livestock slowly.
FAQ
How much does it cost to set up a 75-gallon reef tank?
About $3,264 for Mid-range equipment and supplies, before tax, shipping and livestock. Our Budget list comes to $2,892 and Premium to $4,313. Prices are store listings checked Oct 19, 2026 to Oct 24, 2026.
What are the biggest costs in a 75-gallon reef setup?
In the Mid-range list: light ($530), powerheads ($520), stand ($327). Together they're 42% of the total.
How much does a 75-gallon reef tank cost per month to run?
About $47.11 a month for the Mid-range list at 17¢ per kWh, before food, or $3,829 for the first year including setup.
Is a all-in-one (AIO) reef tank cheaper for a 75-gallon reef tank?
We didn't find an all-in-one reef tank close to 75 gallons in stock at two stores we could check. The nearest were a 65-gallon JBJ AIO (in stock at one store) and Innovative Marine's NUVO INT 75, a drilled tank with stand and sump that is about $3,280 at the one store we found it, so we can't price a fair comparison yet.
Does a 75-gallon reef tank need a sump?
No. A standard 75-gallon tank isn't drilled, so a sump would need a drilled (reef-ready) tank or a hang-on overflow, which adds flood risk. This build uses hang-on equipment instead, which a 48 × 18 in tank has room for. A reef-ready 75 with a sump is a common upgrade, but it changes most of this list.
Other setups
- 20-gallon long freshwater: about $658
- 55-gallon freshwater: about $1,008
- 55-gallon reef: about $2,869
- 75-gallon freshwater: about $1,157
Compare every setup side by side → · What a 75-gallon tank costs per month →
How we size each item, and where prices come from
- Aqueon critical dimensions and filled weights (2023 PDF)
- Complete Aquatics: filter turnover of 4–6× tank volume per hour
- Bulk Reef Supply: reef flow of 20–30× display volume
- Fluval heater sizing (the rule our running-cost calculator uses)
- AquaIllumination: Prime 16HD is 59 W with a 24 × 24 in spread
- Bulk Reef Supply: about 1 lb of dry rock per gallon
- Top Shelf Aquatics sand-bed calculator (L × W × depth ÷ 1,728 × ~100 lb/ft³)
- Bulk Reef Supply: about 0.5 gal/day evaporation for a 36 × 18 in tank (scaled by footprint)
- Listings: hand-picked items checked at 13 stores (AquaticMotiv, Blue Fish Aquarium, Buce Plant, Bulk Reef Supply, Glass Aqua, Inkbird, Ken's Fish, Pets Warehouse, Premium Aquatics, Rockland Aquarium, Top Shelf Aquatics, Tropical Showcase, World Wide Corals) on Oct 19, 2026, Oct 24, 2026. Each item needs 2+ non-Amazon stores; a listing older than 45 days is dropped. The estimated budget is the median listing, rounded.
- How we choose: performance, reliability, value and fit for the tank, without regard to brand or commission. Credible reports of serious problems can rule an item out.