BigSteve, I'm blessed to have 3 guts/fingers in my big puddle. The Tilapia deal was tried because of these, and I also use them for aquatic plant testing. I have Arrowhead and American Pond Weed growing out in one right now. I'll play with them there, and their easily controllable if they don't turn out well.
The gut where the Tilapia were is now a plant nursery for the rest of the puddle.
