In article , Koi-lo Do Not Reply wrote:

"Richard Sexton" wrote in message
...

Flourish Excel is the only thing that will kill algae and help, not harm
plants.
=============================
Since I started using Flourish fertilizers I've got a problem with a black
soot algae. It comes off easily with a scrubber but makes whatever it grows
on look filthy. I'm not sure which of the 3 is causing it. :-(

It started on the glass and now is slowing spreading to the plants
themselves.

I haven't used any SeaChem fertiliers, just the Excel organic carbon source.

Can't say I know what you mean by black soot algae. Got a pic?

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