Budget for a first nano marine aquarium (30-40 litres): the real cost, item by item
Nano reef tanks are appealing for their compact size, but their price often surprises beginners coming from freshwater. Here's a realistic item-by-item budget for a first 30-40 litre marine tank. The fish hub gathers all our fishkeeping guides.
How much do the tank and lighting cost?
- All-in-one nano aquarium (30-40 L): €150-300 depending on the brand, often with built-in rear-chamber filtration.
- Marine-spectrum LED lighting: €60-150, a line item not to skimp on for soft corals or live food.
What budget for saltwater and salt mix?
A 20 kg bag of synthetic sea salt costs €30-50 and can mix dozens of litres of saltwater, best paired with an RO unit at €40-100 for reliable source water, an investment that quickly pays for itself.
What budget for filtration and other accessories?
A protein skimmer sized for the small volume adds €50-100, an extra circulation pump €20-50, and starter live rock and live sand €40-100 depending on the quantity chosen.
What's the total budget to get started?
Budget €350-700 total for a complete first nano reef, excluding fish and corals, an amount worth weighing against an equivalent freshwater tank that costs far less upfront.
Frequently asked questions
Is a nano reef suitable for a genuine fishkeeping beginner?
It's best to have already run a freshwater aquarium for at least a year, since the small marine volume leaves little room for error on water parameters.
Should you plan for a monthly budget after setup?
Yes, budget €15-30 a month for salt, tests and the extra electricity from marine lighting.
Can the starting budget be reduced?
Used equipment (tank, lighting) can cut some line items in half, as long as you check its actual condition before buying. Browse all our guides on the fish hub.
This guide is part of Planète Pets’s Fishkeeping universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.