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Pearling killing riccia / Iron



Anybody ever experience this ? It doesnt seem to affect
any other plants including crypts.

Also, I bought some iron chelate liquid (Fe + EDTA) on sale at
Clar Green. $9/l. It claims to be 2% iron. How
many drops per gallon is typical daily(/weekly) ?

It's easy to spot an iron deficiency, but how do you
spot too much iron without a test kit ? Do the fish
rust or something ? Do stalagtites and stalagmites
start growing?

And so like, what is the best iron test kit out there ?


--
Richard J. Sexton                                         richard at aquaria_net
Maitland House, Bannockburn, Ontario, Canada, K0K 1Y0       +1 (613) 473 1719