Scientific Name: Phyllanthus fluitans
Family: Phyllanthaceae
Description and Requirements
Difficulty: Easy to Medium (Requires specific lighting to showcase its famous coloration).
Growth Rate: Moderate to Fast
Lighting: High (Under moderate light, leaves remain olive green with pinkish roots; under high-intensity light, the entire plant transitions into a stunning crimson red).
CO2: Not required (utilizes atmospheric $CO_2$).
Water Parameters
Temperature: 18°C - 26°C (64°F - 79°F)
pH: 5.5 - 7.5 (Thrives best in slightly acidic to neutral water)
Hardness (GH): Soft to medium
Compatibility and Placement
Placement: Strictly a floating plant.
Compatibility: The absolute favorite choice for premium shrimp tanks (Neocaridina and Caridina setups) due to the breathtaking color contrast it offers. Unlike other floaters, its roots remain relatively short and neat, providing shelter for fry and Bettas without overtaking the swimming space of small schooling fish like Tetras.
Plant Tips & Recommendations
Pro Tip 1: Unlocking the Deep Red Color: To get those famous fiery-red roots and crimson leaves, instruct your customers to combine high-intensity lighting with low nitrate levels in the water column. Mild nitrogen limitation safely triggers the plant to release anthocyanins, turning it bright red.
Pro Tip 2: Still Water is Mandatory: Phyllanthus fluitans is highly sensitive to surface agitation. If filter currents constantly flip the plant or splash water onto the tops of the leaves, it will melt and rot. Advise using a floating feeding ring or airline tubing to partition a calm corner for them.
Pro Tip 3: Iron Loving: Regular dosing of liquid iron supplements will significantly help maintain and intensify the brilliant red coloration of both the leaves and roots.