Alternanthera reineckii 'Pink' XL is the same reliable pink stem plant — supplied in a larger pot with a more established root system and more developed stems. That head start means more immediate visual impact when first planted, without waiting for a small cutting to establish.
Care requirements are identical to the standard size: medium to bright lighting and CO2 supplementation bring out the full pink-to-red tones and encourage compact bushy growth. Without CO2, the plant survives but colour intensity diminishes. Plant in groups for best effect in midground or background positions.
Propagation is straightforward — trim the tops and replant as cuttings, and the original stems will branch and bush out.