Heater wattage
Calculate the watts needed based on volume and the temperature difference between ambient and target.
ΔT5°C
Calculated minimum wattage450W
Recommended wattage500W
Insulation factor0.75
Formula
P = V × ΔT × k (k ≈ 0.5–1.0 W/(L·°C))
The recommendation rounds up to the next commercial size. In large tanks, splitting power across two heaters is often better.
Electricity cost
Estimate the consumption and running cost of aquarium equipment.
Daily consumption (kWh)2.16
Daily cost0.54EUR
Monthly cost16.2EUR
Yearly cost197.1EUR
Formula
Cost = (W × h/day × days) / 1000 × €/kWh
Lighting
Estimate lumens per liter and the lighting technology level for planted tanks.
Lumens/liter30
Watts/liter0.33
ResultMedium-tech (20–40 lm/L)
Lighting ranges
Low-tech (≤ 20 lm/L)Slow plants, mosses, Anubias, and ferns.
Medium-tech (20–40 lm/L)Common stems and medium-demand plants; CO2 recommended.
High-tech (> 40 lm/L)Carpeting and red plants; stable CO2 and fertilization.