Here’s a solid care guide for the L330a Panaque albomaculatus, also known as the Watermelon Pleco—a large, wood-eating pleco known for its unique pattern and bold presence.
Watermelon Pleco (L330a Panaque albomaculatus) Care Guide
Common Names:
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Watermelon Pleco
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L330 Pleco
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Royal Watermelon Pleco
Scientific Name: Panaque albomaculatus (L-number: L330a)
Origin: Upper Orinoco River, Venezuela
Size: Up to 12–15 inches (30–38 cm)
Lifespan: 10–15+ years
Temperament: Peaceful but territorial with other plecos
Tank Setup
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Tank Size: 125 gallons minimum for an adult
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Substrate: Sand or smooth gravel
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Decor:
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Driftwood is essential—they eat wood and need it for digestion
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Rock caves and hiding spots
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Keep decor heavy and stable—they’re strong and can move things
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Plants: Optional—may uproot or damage them
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Lighting: Low to moderate
Water Parameters
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Temperature: 78–84°F (25.5–29°C)
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pH: 6.2–7.5
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Hardness: Soft to moderately hard (5–15 dGH)
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Filtration: Strong and efficient—these fish are messy and produce a lot of waste
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Water Changes: 40–50% weekly
Diet
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Feeding Style: Primarily wood-eating herbivore with some omnivorous behavior
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Staple Diet:
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Driftwood (must always be present)
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Sinking algae wafers
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Fresh vegetables (zucchini, cucumber, spinach)
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Occasional protein: shrimp pellets, bloodworms (not too much)
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Feeding Frequency: Daily
Behavior & Tankmates
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Temperament: Peaceful with most fish; may get territorial with other plecos
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Activity: Mostly nocturnal, but will be active in dim lighting
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Tankmates:
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Peaceful cichlids, tetras, barbs, larger community fish
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Avoid other large wood-eating plecos to prevent competition
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Not suitable for small or delicate species
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Care Tips
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Driftwood is not optional—it’s part of their diet
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Heavy filtration is a must—they poop a lot due to their wood diet
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Provide multiple hiding spots to reduce stress and aggression
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Keep tank covered—these plecos are strong and can jump
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Handle with care—large individuals have spines that can get caught in nets
Want a printable version or care card for your tank? I can whip one up.
