I was expanding the pond in the terra today, and I found that almost all of the duckweed had died out. The other plant in the pond (It has A name that I can never remember, but it lives just like duckweed) was starting to turn blackish, and some of it had sunk to the bottom of the pond. I thought that it might be because I was spraying the terra with alcohol to kill the mites that had gotten in, (It has been working quit well, I'm seeing almost no mites!) and I thought that the alcohol that went into the pond could have started to kill the plants in it.
Please help me out here!Thanx!