Keeping swordtails is great for beginners as they are hardy, colorful, and active livebearers needing a 30+ gallon tank, warm water (72-82°F), slightly alkaline pH (7.0-8.0), and a varied diet of flakes and occasional live/frozen foods; provide plants and decorations for cover, keep males in groups (or alone to avoid aggression), and remember they breed easily and should never be released into local waterways.