Guides

Step-by-step guides for new aquarists: how to cycle a tank, how to use the stocking calculator, and how to set your fish up to thrive.

• How to Use Fish That Fit (2-Minute Guide)

  Feb 2, 2026· Marcus Pace

  A step-by-step walkthrough of Fish That Fit, the aquarium stocking calculator: every input explained, what the bioload percentage means, and how to read the compatibility warnings.

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• How to Cycle a New Aquarium (Without Killing Fish)

  Jan 22, 2026· Marcus Pace

  A beginner-friendly guide to cycling a new aquarium with a fishless cycle: what the nitrogen cycle is, the exact steps, and how to know when your tank is safe for fish.

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