Blue Phantom (L-128) Plecostomus

The Blue Phantom Plecostomus (L-128) is one of the most stunning and unique plecos available in the aquarium hobby. Known for its deep blue body with lighter speckled spots, this striking fish brings a bold splash of color to freshwater aquariums. Native to the Orinoco River Basin in Venezuela and Colombia, the Blue Phantom thrives in fast-flowing, oxygen-rich waters where it spends much of its time grazing along rocky surfaces and shaded riverbanks.

This plecostomus is considered a medium-sized species, typically growing to around 7 inches in length when fully mature. Because of its active nature and need for clean, well-oxygenated water, it is best suited for aquariums of at least 55 gallons. A tank setup that mimics its natural river environment — with smooth rocks, driftwood, and plenty of hiding spaces — will help this pleco feel secure while also highlighting its natural beauty.

The Blue Phantom Pleco thrives in water conditions with a temperature range of 75–82°F (24–28°C), a pH between 6.0 and 7.5, and soft to moderately hard water. Strong filtration and regular water changes are essential, as this fish comes from pristine rivers with strong currents. Adding extra aeration will also benefit this pleco, keeping it active and comfortable.

When it comes to diet, the Blue Phantom Plecostomus is an omnivore that leans toward plant-based foods but also requires protein in moderation. In the aquarium, it should be provided with a balanced diet consisting of sinking algae wafers, high-quality pleco pellets, and blanched vegetables such as zucchini, cucumber, and spinach. To supplement its protein needs, occasional treats of bloodworms, brine shrimp, or shrimp pellets are ideal. A varied diet not only ensures long-term health but also helps maintain the pleco’s intense blue coloration.

In terms of temperament, the Blue Phantom Pleco is generally peaceful and can coexist with a wide variety of community fish. It does especially well with mid-level or top-dwelling species such as tetras, rainbowfish, barbs, and peaceful cichlids. However, like many plecos, it may show territorial behavior toward other bottom-dwellers, especially if tank space and hiding spots are limited. Providing multiple caves and driftwood structures helps reduce aggression and gives each fish a place to call its own.

Frequently Asked Questions

1. How big does the Blue Phantom Plecostomus get?
It typically grows up to 7 inches in captivity.

2. What tank size is recommended?
A minimum of 55 gallons is recommended to ensure enough space and strong water flow.

3. Is the Blue Phantom Pleco aggressive?
It is generally peaceful but may become territorial with other plecos if hiding spaces are scarce.

4. What should I feed my Blue Phantom Pleco?
A balanced diet of algae wafers, vegetables, and occasional protein such as bloodworms or shrimp.

5. How long does it live?
With proper care, the Blue Phantom Pleco can live 10–12 years.

The Blue Phantom Plecostomus (L-128) is a rare and striking species that appeals to both beginner and experienced aquarists. Its vibrant blue coloration, manageable size, and algae-eating habits make it an excellent choice for community aquariums. For further reading on pleco care and species profiles, visit trusted resources like Seriously Fish.