Here’s a solid, no-fluff care guide for the L200 Loricariid, also known as the Green Phantom Pleco—a stunning species known for its vibrant green-to-yellow coloration.
L200 Green Phantom Pleco Care Guide
Common Names:
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Green Phantom Pleco
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L200 Pleco (sometimes split into L200a & L200b depending on variant)
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Yellow Seam Pleco (if tail has yellow edges)
Scientific Name:
Hemiancistrus subviridis (often associated with Baryancistrus demantoides—taxonomy still debated)
Origin: Orinoco River Basin, Venezuela & Colombia
Size: 6–8 inches (15–20 cm)
Lifespan: 10–12 years
Temperament: Peaceful, semi-territorial with other bottom dwellers
Tank Setup
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Tank Size: 55 gallons minimum for a single adult
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Substrate: Sand or fine gravel
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Decor:
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Smooth rocks and rounded caves
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Driftwood (not essential for diet, but good for shelter)
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Multiple hiding spots—helps reduce stress and aggression
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Plants: Hardy rooted plants or floaters; generally plant-safe
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Lighting: Moderate to low—prefers dim conditions
Water Parameters
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Temperature: 79–86°F (26–30°C)
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pH: 6.0–7.2
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Hardness: Soft to moderate (3–10 dGH)
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Filtration: Strong and well-oxygenated—this species comes from fast-flowing rivers
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Water Changes: 30–50% weekly—sensitive to nitrates and unstable water
Diet
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Feeding Style: Omnivorous with a preference for plant-based food
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Staple Foods:
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Algae wafers and sinking omnivore pellets
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Blanched vegetables (zucchini, spinach, cucumber)
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Occasional protein: bloodworms, brine shrimp, shrimp pellets
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Feeding Frequency: Once or twice daily in small portions
Behavior & Tankmates
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Activity: Primarily nocturnal but may adjust to daytime activity
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Temperament: Generally peaceful but can be territorial with other plecos
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Good Tankmates:
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Tetras, rasboras, angelfish, peaceful cichlids, rainbowfish
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Avoid large/aggressive fish or plecos that compete for space
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Note: Should not be kept with overly dominant bottom-dwellers unless space allows
Breeding
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Breeding in Captivity: Rare but possible
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Breeding Type: Cave spawner
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Requirements: Warm, soft water with strong flow and high oxygen
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Egg Care: Male typically guards the eggs; fry feed on biofilm and later powdered food
Care Tips
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Needs high oxygen levels—consider powerheads or air stones
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Provide multiple hiding spots to prevent territorial disputes
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Avoid sharp decor—can damage their soft underbellies and fins
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Good flow is key—simulate river-like conditions for long-term health
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Watch for bloating or barbel wear—signs of poor water or wrong substrate
Let me know if you'd like this as a printable sheet, a care card, or grouped with other plecos for comparison.
