On Mon, 01 May 2006 10:19:07 -0300, Derek Broughton
wrote:

If it was fertilizer without _nitrate_ (15-30-15 isn't), then it probably
wouldn't hurt. Algae requires only two of the three fertilizer
ingredients, so adding potassium (?? I hope I have that right - I forget
the contents of the FAQ I wrote...) helps other plants use up the nitrate.

I guess if it is bad advice, you shouldn't do it, but for the past
several years I've usually had to fertilize the water hyacinths to get
them to grow. I tried the potassium and that didn't produce the most
positive results, although I know you are right it takes potassium for
plants to be able to assimilate nitrates, and I think phosphates too.

Regards,

Hal