Low Light Success...with Mod. Light plants
In some cases a newly set up tank will make almost anything grow as if
there's no tomorrow.
When I initially set up my 55 gal. I'd return from work and see a
brand new 3 inch leave of Aponogeton crispus that was not there in the
morning. Every sinlge day. Some other plants grew in a similar way.
Some did not grow at all though.
I had 2 wpg and the growth was out of this world. For about 2 weeks
What you see is totally normal. Later you will try to emulate it
using traces, Iron, and what not. It will never be the same insane
growth rate though.