bolbitis heudelotii (plant) problem

[Kate Breimayer <kate@munat.com>]

Hi,
I am having a problem with my bolbitis ferns-the stems are turning black 
and rotting, then leaving the ends with the leaves free to disconnect 
and drift away from the mother plant. Some leaves also turn black. 
Rhizomes are attached to wood, look fine. This is happening in multiple 
tanks. I have been pretty bad about fertilizing and light bulbs may be 
old but it seems odd that such a tolerant plant would suffer the worst 
for it while rotala indica which likes light/fertilizer survives and 
turns pink at the ends. Any bolbitis tips? Or do the old leaves just do 
this after a while? Seems like more than half of the leaves on the 
affected plants are going down, so it's probably not only the oldest 
leaves dying, though the new ones are ok... Other tanks have younger 
bolbitis cut from the same mother plant with the same water parameters, 
no problem with them.
Tips?
By the way, is this considered OT for this group? Maybe replies should 
be off list... :)
Kate

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