One-time purchases
Make a local shopping list for the aquarium, stand, lid, filter, heater if needed, thermometer, light, substrate, water tests, conditioner, net, siphon, and dedicated bucket. Add décor, plants, livestock, shipping, and tax. Obtain current quotes rather than using a universal setup price.
Recurring costs
Include food, conditioner, test refills, electricity, replacement equipment, and water. Calculate electricity as watts ÷ 1,000 × operating hours × your price per kilowatt-hour. A heater cycles on and off; its labeled wattage is not its average consumption.
Leave room in the budget
Keep a reserve for separate housing, equipment failure, and unexpected care. A larger tank can cost more initially while giving more room for suitable stocking. Decide from the species’ needs and the total cost rather than the tank’s sale price.