Sure isn't anything happening on the bog forum.

I have a 300 gallon Rubbermaid stocktank that is sunk into the ground and filled with soil, with about 8" of water on top.

I've had a lotus in there for about 7 years. I have recently realized that I should be fertilizing it alot more than I do.
It didn't make any blossoms this year, but made a ton of aerials. Does that sound more like a fertilizer problem, or an overcrowding problem?
If it is overcrowding, how do I thin it? Can I just yank out some of the stems and hope that tubers come with it? Or should I lay on the ground and stick my hand down in the mud and feel for tubers, and pull them??

Any suggestions?
Thanks.