Tools
Each tool reads the same catalog fields as the rest of the site, so a figure here never disagrees with the page it came from.
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Aquarium plant finder: plants for your light, CO₂ and experience
Answer four questions about your tank and see which aquarium plants in the catalog grow in that light, with or without CO₂, at your level of experience.
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Aquarium volume calculator: gallons, liters and water weight
How many US gallons and liters your aquarium or fish tank holds: rectangular, cylinder or hexagon tanks, in inches or cm, plus the weight of the water.