Originally Posted by Autumnsky
Go to the local pond or stream and look for fish... and free plants.
I used to get fish from the ditch, not even a pond when I was a kid - long ago! Now I can't really ever find them or catch them if I can see them (too far away from the edge).
In my area there's a ton of free hornwort, duckweed, anacharis, val americana, some sort of huge sword, and also water lettuce!