Purple dragon fruit cactus

I purched the seeds off of ebay 2 years ago. I planted them in a small flower pot and they sprouted. It eventually out grew the pot and the roots were hanging out the bottom. So i deceided to put a container under it and fill it with water. Because this the cactus has grown rapidy in the past year due to I guess you can call a hydroponic set up. Hopefully next year it will bear some small fruit.