Are there any suggestions for live plants in a 30 gallon goldfish tank? I currently have some Brazilian Sword plants, but I'd like to have something taller to cover the upper part of the tank. Currently I have silk anubias plants, and they're helping, but I would much prefer live plants. I have also resorted to things like spinach as treats to keep them (only 2 goldfish) from eating the live plants. Any suggestions?