What do you think is causing this type of growth in my Downoi?





I have it in a 55 gallon tank with ADA Aquasoil
I dose EI religiously
i have 4-55 watt 9325K GE PC bulbs on for 8.5 hours a day
I have pressurized CO2 with a pinpoint controller
My Ph is set for 5.7

HC is doing well
Utric is happy and spreading fast
But I am not sure why the downoi is growing with such large separation between the leaves.

I posted this on The Planted Tank Forum without much luck, Thought I would
try it here as well.
What are your thoughts?
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