How much does a reef tank cost? (real 2026 numbers)

Curated by the Fast Aquatics editorial team · Updated May 2026 · Sources

The honest cost of building and running a reef tank. Setup ranges $1,200 - $25,000+ depending on size and equipment tier. Monthly operating costs $35-200. Here's the breakdown.

Nano reef (10-30 gallons)

Setup: $800-2,000

AIO tank + stand: $300-700 (Innovative Marine Nuvo, Waterbox AIO)
Lighting: $150-400 (AI Prime, Kessil A80)
Heater + return pump: $50-100
Live rock + sand: $80-180
Salt + RO/DI water: $30-50
Test kits + refractometer: $80-150
Cleanup crew + first coral: $60-150

Monthly running: $35-80 (salt, food, supplements, electricity)

Mid reef (40-90 gallons)

Setup: $2,500-6,000

Tank + stand + sump: $700-1,800 (Red Sea Reefer, Waterbox)
Lighting: $400-1,200 (2x Radion or 2x Kessil A360X)
Skimmer: $300-800 (Reef Octopus, Bubble Magus, Nyos)
Return + powerheads: $150-400
Live rock + sand: $200-500
RO/DI unit: $200-400
Test kits + tools: $150-300
Initial livestock + coral: $400-1,000

Monthly running: $60-150

Large reef (120+ gallons)

Setup: $6,000-25,000+

Tank + stand + sump: $2,000-6,000. Lighting (4x Radion or full LED rack): $2,000-4,000. Skimmer (large in-sump): $600-1,500. Pumps + powerheads (multiple): $400-1,000. Controller (Apex / Hydros): $400-1,000. Dosing pumps + ATO: $300-800. Live rock + sand: $400-1,000. RO/DI: $300-500. Initial livestock + coral: $1,500-10,000.

Monthly running: $100-300

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Frequently asked questions

What's the cheapest way to start a reef tank?

AIO 14-20 gallon nano. Innovative Marine Nuvo 14g + AI Prime 16HD + small Tunze skimmer + 15 lbs dry rock + cleanup crew. Total ~$800 setup, ~$40/month running. Great learning tank, expandable later.

What's the most expensive part of a reef tank?

Lighting, then livestock + coral over time. Premium lighting can be $2,000-4,000 alone. SPS coral collecting at the cultivar level can run $5,000+ per year for a serious collector.

Are reef tanks expensive to maintain monthly?

Average mid reef: $60-150/month. Salt mix is the biggest line item ($20-30 for monthly water changes), then food + supplements + electricity. Reef-tank electric draw is real - 2 powerheads + lighting + skimmer = $25-40/month at typical US rates.