Fish care
Guppy: Complete Care Guide
Last updated: May 2026
Structured care sheet for Guppy (Poecilia reticulata). Validate every purchase with the free aquarium stocking calculator, parameter testing habits, and the species database table.
- Cross-check length and temperature against the species explorer.
- Track nitrate drift weekly once the tank has cycled.
- Refer to the species hub for long-form tank mate essays.
Livebearer ratios and feeding
Guppies reproduce predictably; keeping two or more females per male reduces harassment stress. Feed small meals often instead of single heavy dumps - constipation and bent spines worsen when pellets alone meet “enthusiasm.” Vegetable matter matters: algae films, spirulina-weight foods, or blanched greens keep guts moving.
Water hardness and longevity
Retail lines span soft-water farms and limestone-hard taps. Chronic fin erosion in rock-hard municipal water sometimes improves by blending RO or rainwater for changes; ultra-soft setups need mineral reassurance for osmotic stability. Whatever you choose, change water on a rhythm so waste never outpaces buffering.
See tank mate combinations tuned to temperament overlap.
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