In article ,
Koi-Lo wrote:

"Richard Sexton" wrote in message
...
In article ,
Koi-Lo wrote:
I add about 2 heaping Tbs. Potassium (for gardens) when I add the floating
plants. That's the ONLY fertilizer I add to the pond water. Koi will
still
nibble the roots to the point where my water hyacinth doesn't thrive.

You're low on iron (+traces).
=========================
That may be but I was unable to find any liquid Iron safe for fish. I

Huh? It's all good. Even washers in the substrate will work. I do that too.


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