Practical answers for real aquariums.
Short, honest guides on the questions every fishkeeper eventually asks—each one linked to the calculator that does the maths.
How Many Fish Can You Keep in a 10 Gallon Tank?
Realistic stocking ideas for a 10 gallon (38 litre) aquarium: how many fish fit, which species work, and which common choices to avoid.
Read guide →02How Many Fish Can You Keep in a 20 Gallon Tank?
Stocking a 20 gallon (75 litre) aquarium: realistic fish counts, proven community combinations, and the difference between 20 High and 20 Long tanks.
Read guide →03How Long Does It Take to Cycle an Aquarium?
The aquarium nitrogen cycle explained: realistic timelines for fishless cycling, how to speed it up safely, and how to know your tank is ready for fish.
Read guide →04How Much Electricity Does an Aquarium Use?
What an aquarium really costs to run: heater, filter and light consumption explained, with realistic monthly kWh figures and practical ways to cut the bill.
Read guide →05How Much Gravel Do You Need for an Aquarium?
Work out exactly how much gravel, sand or aquasoil your aquarium needs: recommended depths, a simple formula, and litre-to-kilogram conversions by material.
Read guide →06What Size Heater Does Your Aquarium Need?
Choose the right aquarium heater wattage: the watts-per-litre rule explained, a size chart from 20 to 400 litres, and when two heaters beat one.
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