HMPK Betta Splendens #T137

The HMPK Betta Splendens #T140 features a half-moon caudal fin that spreads nearly 180 degrees, providing continuous visibility in standard residential aquariums. This selective breeding line maintains high-contrast pigment stability under typical household bulbs, removing the requirement for specialized spectral lighting to track baseline hue progression. The underlying physiology balances extended fin length with a manageable disposition suited for steady observation in display-focused enclosures.

Defining Visual and Behavioral Traits

• Nearly 180-degree horizontal tail spread when relaxed or displaying
• Stable color retention that maintains visibility under typical room illumination
• Moderate activity level suited for both beginner observation and advanced layout testing

Established Maintenance Parameters

• Minimum holding volume: 5 gallons of conditioned freshwater
• Thermostat range: consistent 76–82°F (24–28°C)
• Aeration and filtration: low-output pumps to avoid strong directional currents
• Chemical balance: pH stabilized between 6.5 and 7.5 with partial water exchanges conducted roughly every seven days
• Nutritional protocol: commercially prepared Betta pellets or micro-flakes administered in precise portions two to three times each day

Enclosure Configuration

Place this variant in a clear-glass nano or desktop enclosure backed by soft substrate and dense live or artificial plants. Secluded hiding spots minimize lateral stress while open glass panels preserve uninterrupted viewing angles for tail-fan calibration. Hobbyists and classroom instructors select the #T140 model to evaluate sustained color expression and stable half-moon mechanics in standardized freshwater environments.