Not even about growth, although it hasn't grown at all.. The color is dud green/grey. Apparently it was chewed by one of Adams rabbit fish, so it needed some time to heal before shipping. It just never came in with any color. Mine is in 350-365 par , 5-10 no3, .06-.08 po4. It gets strong flow as it sits kinda on a peak of a rock. I was actually thinking to lower it in the tank, thinking the flow and light was to high. I has another 4-6 months before I decide if it stays or walks its way to the trash.Thats strange as its a fast grower for me, what are your parameters and where in your tank is it placed? Mine sits at 400 par lots of random flow.