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Re: Heteranthera zosteriofolia

Michael Eckardt was asking....

>I need some help with H.z.! 
>New leaves grow green but as they become older, they turn black, as if they
>were damaged somehow. They are in full light, and everything else in this
>tank (2 dozen or so species) grows very well. 
>Could it be the current? Low Ca-levels? Too much iron (at .1-.2 ppm)? Any

Michael, my stargrass takes on the same appearance under similar
conditions. I removed it to a punishment tank where it has been
for the last two months -no nutrients, no light, no current. It
seems fine, but I don't know what to do with it. It's very fragile
and delicate. Maybe it would do best in a small aquarium.

Perhaps it dislikes CO2 injection, soft water and low pH. It's
a good question.

Dave Whittaker
ac554 at FreeNet_Carleton.ca