If you are looking for a true vascular plant for your saltwater tank I would strongly consider getting a portion of manatee grass. The amount was more than I expected and it looks great. May shed some material before it establishes.
Saltwater Sea Grass for sale. Aquacultured USA. Manatee grass (Syringodium filiforme).
Hardy strain of sea grass for saltwater aquarium. We have been culturing this for ten years. It’s great for growing baby seahorse fry and fish fry of all kinds also dwarf seahorse.
This sea grass originally comes from the habitat areas in the ocean where many species of fish, snails, crabs and shrimp start out their lives.
This saltwater sea grass is great for helping to keep aquarium water clean and healthy by absorbing nutrients and fish waist.
Sea grass for Refugium also, but needs light to thrive. Once it acclimates to your tank environment it will start to grow more stalks from the roots of the existing stalks. This is true marine sea grass: the marine version of terrestrial grass.
Excellent as a decoration to add some green to the display tank.
Uses nitrates, phosphates and fish waist as food to grow.
Sea grass is a habitat shelter for Amphipods, Copepods, fish, seahorses, snails, crabs, and shrimp.