A nano reef is a 10-30 gallon saltwater tank, typically all-in-one (AIO) format with built-in filtration. Tighter footprint = tighter parameter swings, so equipment quality matters more than in larger tanks. Here's the full build path.
Innovative Marine Nuvo 14g + 20g. AIO format, clean fit + finish, well-engineered media baskets. Industry standard for nano reef.
Waterbox AIO 16g + 25g. Premium glass + low-iron front panel. Slightly higher price point.
Red Sea MAX Nano 20. Plug-and-play with included light + skimmer. Best 'one-box' option for first-time reefers.
AI Prime 16HD. 60w of mixed white + blue + UV. Covers 15-20 gallon footprint. ~$350.
Kessil A80. Single-puck spotlight. Great color rendition, gentler shimmer than Prime. 30 watts.
EcoTech Radion XR15 G6. Premium-tier nano. Overkill for a 14g, perfect for a 25g+.
Use 1 lb of dry rock per gallon. Add a small piece of cured live rock or a bottle of Dr. Tim's One and Only to seed nitrifying bacteria. Cycle for 7-14 days, dosing ammonia to 2 ppm. Tank is cycled when ammonia + nitrite both read zero within 24h of dosing.
Week 1-2: cleanup crew (5-7 hermits + 5-7 nerite snails). Week 4-6: first fish (ocellaris clown). Week 8-10: second fish (firefish goby). Week 12+: corals, then advanced fish. Don't rush - nano reefs reward patience.
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Browse reef-ready saltwater fish →Realistic minimum is 10 gallons AIO. Below that, parameter stability becomes too hard to manage. The sweet spot is 14-25 gallons - large enough to forgive mistakes, small enough to maintain in 30 minutes a week.
Yes. One ocellaris clownfish (captive-bred) does fine in 10 gallons with cleanup crew + soft coral. Skip pairs - they need 20+ gallons.
Mushrooms (Discosoma, Rhodactis, Ricordea), Green Star Polyps, zoas, leather corals. All thrive at moderate light + tolerate parameter swings.
Recommendations on this page cross-checked against the following authoritative references and our internal vendor + breeder database.