Tank size, water parameters, diet, temperament, reef-safety, and which species fits which keeper. All data cross-checked against vetted Fast Aquatics vendor records.
| Min tank size | 20 gallons |
| Care difficulty | intermediate |
| Diet | Omnivore |
| Temperament | Peaceful |
| Reef-safe | n/a |
| Temperature | 74-80°F |
| Min tank size | 20 gallons |
| Care difficulty | beginner |
| Diet | Omnivore |
| Temperament | Peaceful |
| Reef-safe | n/a |
| Temperature | 74-80°F |
| Use case | Recommended |
|---|---|
| Best for beginners | Ludwigia Repens |
| Best for nano tanks (under 30 gallons) | Rotala Rotundifolia |
| Hardiest in established tanks | Ludwigia Repens |
Pros: Adult size fits 20 gallons tanks well. Easy to feed on standard pellet/flake/frozen diets. Reef compatibility: n/a.
Cons: Requires intermediate-level husbandry experience. Sourcing premium specimens can require waiting for charter breeder drops.
Pros: Hardier than Rotala Rotundifolia for first-time keepers. Adult size fits 20 gallons tanks well. Easy to feed on standard pellet/flake/frozen diets. Reef compatibility: n/a.
Cons: Sourcing premium specimens can require waiting for charter breeder drops.
Mixing Rotala Rotundifolia and Ludwigia Repens in one tank depends on adult size overlap, territory needs, and water-chemistry match. Peaceful/Peaceful pairing means both species share similar temperament so direct fights are rare, but resource competition (food, territory, hiding spots) is common. Both species need water parameters within 74-80°F and 74-80°F. If keeping together, introduce the more peaceful species first by 2-4 weeks, provide multiple hiding spots, and feed at separate ends of the tank.
Both Rotala Rotundifolia and Ludwigia Repens sell at three tiers on Fast Aquatics and competitor sites. Budget tier (pet-store grade): $5-50. Mid-tier (LFS or online vendor stock): $25-200. Premium tier (named lines, charter breeders): $100-2,000+. Captive-bred or aquacultured specimens cost more upfront but ship healthier than long-supply-chain wild-caught. Browse Rotala Rotundifolia and Ludwigia Repens live availability on Fast Aquatics for current vendor pricing with carrier-tracked Buyer Protection on every order.
Ludwigia Repens is the better choice for beginners. Rotala Rotundifolia requires intermediate-level experience.
Rotala Rotundifolia requires 20 gallons minimum, while Ludwigia Repens needs 20 gallons. Both should be planned around adult size, not juvenile size.
Compatibility depends on adult size, temperament, and territory overlap. Both are typically considered peaceful (Rotala Rotundifolia) and peaceful (Ludwigia Repens) species. Always quarantine both, introduce the more peaceful species first, and monitor for aggression in the first 30 days.
Pricing varies by source and grade. Budget specimens from pet-store-grade vendors run $5-50 for both species. Mid-tier specimens run $25-200. Premium grades (charter breeders, named lines) reach $100-2,000+. Browse Fast Aquatics for current market pricing.
Rotala Rotundifolia is rated n/a and Ludwigia Repens is rated n/a. For mixed-reef setups, prefer the species rated reef-safe; species rated "with caution" or "no" need careful tankmate planning.
Rotala Rotundifolia: Omnivore. Ludwigia Repens: Omnivore. Diet match-up matters for compatible feeding schedules and nutritional needs.
Browse the full comparison library for more side-by-side species breakdowns. See full care guides for Rotala Rotundifolia and Ludwigia Repens for the complete husbandry breakdown of each.