Showing 1-12 of 14 posts
Conversions · Oct 17, 2026
Work out how many gallons your fish tank or aquarium holds from its length, width and height, in US and UK gallons, and identify an unknown tank by its size.
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Stocking Guides · Oct 17, 2026
How many fish you can keep in a 5, 10, 20, 29 or 55 gallon tank, using the inch per gallon rule properly, with example stocking lists for each size.
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Guides · Oct 17, 2026
How much a full fish tank weighs, with water, glass and gravel weights for 10, 20, 29, 40, 55, 75 and 125 gallon aquariums, plus how to work out any tank.
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Guides · Oct 17, 2026
How to measure a fish tank and find its volume in litres and gallons, with formulas and worked examples for rectangular, cylinder, hexagon and corner tanks.
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Size Guides · Oct 17, 2026
Standard fish tank dimensions in inches and centimetres for 5, 10, 20 high, 20 long, 29, 40 breeder, 55, 75, 90 and 125 gallon aquariums, with footprint and filled weight.
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Care Guides · Jul 12, 2026
How much aquarium salt to add per litre for tonic and treatment doses, which fish tolerate salt, and how to remove it safely, with a free salt calculator.
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Guides · Jul 12, 2026
Work out exactly how much gravel, sand or aqua soil your aquarium needs, the right depth for your tank, and how many bags to buy, with a free substrate calculator.
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Equipment Guides · Jul 12, 2026
How much light aquarium plants need in lumens per litre, why low, medium and high light differ, and how to avoid algae, with a free light calculator.
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Maintenance Guides · Jul 12, 2026
A simple aquarium cleaning routine: how much water to change, how to vacuum gravel and clean the glass without harming your filter bacteria or stressing fish.
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Setup Guides · Jul 12, 2026
Cycling a new aquarium builds the bacteria that keep fish safe. Here is the nitrogen cycle explained simply, plus a step-by-step fishless cycle.
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Equipment Guides · Jul 12, 2026
Learn how to size an aquarium filter by turnover (litres per hour), why rated flow is misleading, and how to match filtration to your tank and fish.
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Pick the right aquarium heater wattage for your tank size and room temperature, with a simple watts-per-litre rule and a free heater calculator.
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