Originally posted by waterfaller1
I have trained elongata to grow on my glass,and pom pom to grow on my overflow box.
Neat pet trick
I too have the pom pom zenia all over my 54 corner, and just recently (2 months ago) put a 3-4 inch Dersa clam in. Before the Dersa I used to pull 10-20 stalks of the zenia out every month, but in the last few months have noticed a slower growth. There could be other causes of course.
I don't have direct proof that both are taking in nitrates, because I've never had detectable nitrates. In my tank at least, over the past few years, my zenia and macros definitely grow faster when I feed the fish more than usuall, or dump more zooplanton than normal, or when I increase the animal bioload in my tank. IMO, zenia are great natural nitrazorbs.
If you don't want zenia growing out of control in your tank, especially the pom pom stuff, start it at the top. It usually will spread toward the lighting.
Chiton