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re: het. zost. (stargrass)
Would be interested to know your water change
I do think it's a nutrient thing. But I'm not sure
what. Probably not N and P, if you have a high fish
load. It would be interesting if you switched to a
commercial fert (TMG, Flourish) for a couple weeks and
checked to see of the black edges went away. I gave
up on using my own PMDD concoction (Fertilome iron
product + other stuff) a long time ago, and have had
better success with the commercial stuff (but then
again, I get it for real cheap).
I should also note that stargrass is VERY sensitive to
macro/micro deficiencies. It turns white before any
other plant shows signs.
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