The L128, also known as the Blue Phantom Pleco or Hemiancistrus sp. "L128," is a beautiful and sought-after species of pleco. Here are some key points about the L128:

- Appearance: The L128 pleco is named for its stunning blue coloration. It has a dark blue to black body with striking blue or turquoise markings and patterns. The body is covered in small, intricate patterns, and the fins are also adorned with blue coloration. The overall appearance of the L128 is eye-catching and highly appealing.

- Size: The L128 pleco is considered a medium-sized species and can reach a size of around 6-7 inches (15-18 cm) in length. However, individual growth rates and sizes can vary. It's important to provide them with adequate space in the aquarium to accommodate their adult size.

- Behavior: L128 plecos are generally peaceful and can be kept with other non-aggressive fish species. They are typically more active during the evening and night, exhibiting typical pleco behavior of scavenging and exploring the tank. Providing hiding spots such as caves, driftwood, and rocks is important to help them feel secure.

- Habitat and Water Conditions: The L128 pleco is native to the Rio Xingu basin in Brazil, where it inhabits rocky and fast-flowing rivers. To replicate their natural habitat, provide a tank with plenty of hiding places, such as caves or crevices in rocks. They prefer slightly acidic to neutral water conditions with a pH range of 6.0-7.5 and a temperature range of 75-82°F (24-28°C).

- Diet: L128 plecos are omnivorous and have a diet that consists of both plant matter and small invertebrates. In the aquarium, they can be fed a varied diet that includes high-quality sinking pellets or wafers formulated for plecos, as well as occasional live or frozen foods like bloodworms, brine shrimp, or small invertebrates. Supplement their diet with fresh vegetables like blanched zucchini or cucumber.

- Tank Requirements: Due to their adult size, L128 plecos require an adequately sized aquarium. A tank with a capacity of at least 30 gallons (113 liters) is recommended for a single adult L128 pleco. Efficient filtration is important to maintain good water quality, and regular water changes are necessary to keep the water parameters stable.

- Compatibility: L128 plecos are generally peaceful and can be kept with other non-aggressive fish species that are compatible with their needs. However, it's essential to avoid keeping them with overly aggressive or territorial fish that may harass or outcompete them for food and hiding spots. Additionally, ensure that tankmates are not small enough to be considered prey for the L128 plecos.

The L128 Blue Phantom Pleco is a stunning and fascinating species that can be a captivating addition to a suitable aquarium. Their striking blue coloration and intricate patterns make them a standout in any tank. Just ensure you provide them with appropriate hiding spots, a varied diet, and optimal water conditions to promote their health and well-being.