Jerry - My guess was that the water parameters may help somewhat but I think it's probably just the type of plant it is. The lake that supplies my tap water is nearby, this one is for the nuclear plant! Maybe that's why? I've got one nuclear plant in my aquarium. lol. I doubt the light or nutrients factor in. This lake is clean and healthy with plenty of sun beating down along that part of lake.

Thanks Neal. I wasn't too concerned about uninvited guests as I've got clown loaches and others to take care of that kind of stuff. I didn't mention that I also grabbed a tiny little tuft of what looked like hairgrass and my clowns went crazy digging it up to get at whatever was there. This piece that I just pinched off was about 8" long and now it's moving across the surface of my tank. I could fill my tank with this one piece, but I don't think I will as I've got 4 pennyworts on the way. It's nice to know that I've got this very simple, free option though. It would have been more temping a month ago, but I've gotten a little better with the more difficult, exotic ones. BTW-If I get rid of any exotic plant, it gets flushed...I'm guessing that's what most people do?

Trivr