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Reef Directory Water parameters guide

Callum Reyes

Illustrated portrait of Callum Reyes
Writes the livestock guides

Callum spent his teens working weekends at a local fish store, where he learned which fish get returned and why.

Writes About
  • Compatibility and temperament
  • Minimum tank sizes, honestly stated
  • The stocking simulator

The livestock pages here are built on that experience: temperament first, adult size second, color last. He helped design the stocking simulator so newcomers could make the classic mistakes on screen instead of in glass.

“Every fish that gets returned to a store was an information failure. The guides exist so the damsel warning arrives before the damsel.”

Reach Callum through editor@reefdirectory.com — corrections are welcomed and credited.

Also writing here: Soren Dahl · Priya Nandakumar · About the site