I have a 10 gallon tank with a Dragon Bichir and I would like to have natural plants in the aquarium. I know there is a variety of plants that I can get from walmart/petsmart/petco. But is there another way I can get aquarium safe plants without buying them? For instance, I've heard of the water onion plant and although I know that the water onion plant differs from the green onion plant, would the green onion plant still work? I've had them partially submerged in water (not in a tank), and they didn't decay. It's probably a horrible idea, but I'm new to fishkeeping (extremely, like first tank ever new) and unfortunately have limited funds. Thank you for your time and patience.