So this might be extremely subjective, but I have a 15 gallon all in one that I put a green polyp toadstool into. I was doing some high light for a while but recently turned my nicrew 30w all the way down to the lowest blue setting and left the toadstool in a corner under the return flow.
I can honestly say that in the following two weeks, PE went from 1/2 inch, to almost triple that. The polyps themselves have also shrank in circumference to accomodate this length and... You guessed it, it looks almost exactly like it's getting into Japanese Weeping Willow territory if this trend continues. I've attached very short 3 second video to give you all an idea of what it has become this last week. I'll update if this continues!!!
I can honestly say that in the following two weeks, PE went from 1/2 inch, to almost triple that. The polyps themselves have also shrank in circumference to accomodate this length and... You guessed it, it looks almost exactly like it's getting into Japanese Weeping Willow territory if this trend continues. I've attached very short 3 second video to give you all an idea of what it has become this last week. I'll update if this continues!!!