This bright green plant grows in my front yard. It pops up in the Spring, dies off in the Summer and comes back in the Fall. I didn't think much of it until I saw a thread a while back on one of the other aquatic plant forums that showed what looked like this plant growing submersed and I lost the thread. I threw a stem into a tank about a week ago to see how it does. Can someone ID this and confirm whether it really is an aquatic?
That's it Judi. Thank you! I hope it is Lysimachia nummularia 'Aurea', which is supposed to be both undemanding and a good indicator of nitrates in the tank. I like!