This Glass Plant Pot is perfect for planted or shrimp tanks.
It attaches via two suction cups supplied to the aquarium glass wall.
You could add some moss or even some rooted plants (with some soil).
Great for plants that require higher light as you may situate it closer to the aquarium light source.
Example photo is of Hemianthus Callitrichoides 'Cuba' grown under an Up Aqua Pro Z LED light with CAL Aqua Black Earth Premium soil.