Well I disagree with you. I like ulvaceus very much. I don't think its too
big for anything above 55 gallons. Aponogeton bovinianus is about the same
size, and most other Aponogetons have leaves just as long. Most sword plants
will outgrow even very large tanks eventually. Crinums can grow leaves three
or four feet long with massive root systems. Some Vals get two or three feet
long. Giant hairgrass a couple feet or more, there are some very large
Anubias species. Tiger lotus would probably be too big by your standards.