Glossostigma elatinoides is commonly used as a foreground plant in aquariums. Plant several pots of Glossostigma in the desired areas and then watch them expand to form a dense carpet.
Light Needs: Medium to High
Plant Structure: Stem
Size: 2-3 cm (1-1.5in)
Growth Rate: Fast
You are buying one pot. Potted aquatic plants are much better to start with as they have the entire root system intact which makes them easier to transplant and less likely to go into shock when transplanted.
Depending on how you plant it will cover a 2.5" to 2.5".
Potted plants are started in rock wool. To plant remove as much rock wool as possible. Most of the rock wool will pull off. If you have any left and want it off, shake the plants gently by holding it by the roots and shaking in water. Leaving some rock wool will help anchor the plant in your substrate.
Separate the plant into 1/8" pieces with roots and plant 1/8" to 1/4" apart in your substrate. This will leave room for the plant to propagate and spread. If you want instant gratification, you can plant closer. It will take more plant to fill in the area you want to cover when planting closer.
Only plant the root in your substrate, not any of the plant itself or this can cause melting or shock. For more information on planting and caring for your plants, please go here