Aquarium Size Calculator
Tell us about your space, budget, and reef goals. We’ll size your tank, recommend filtration capacity, lighting, flow, and assemble a reef-tested equipment shortlist.
Match the right reef tank to your space, budget & goals
No guesswork. Plug in your room, budget, and ambitions — get the recommended tank size, filtration, lighting, and equipment list.
How sizing works
Reef tanks behave very differently depending on volume. Our calculator factors in:
- Footprint vs available space
- Stocking density (fish + corals)
- Water volume vs filtration capacity
- Difficulty curve at smaller volumes
- Equipment scaling: skimmer, lighting, flow
⚠ Safety notice: Estimates are guidelines — always validate with a reefing community or local fish store before final equipment purchase. Underwater equipment carries electrical risk; install GFCI outlets.