"Geezer From The Freezer" wrote in message
...


Tispe wrote:

Thanks, another question......what is a normal range for nitrates and
phosphates?

My light is flourescent.....should I still change it?

Thanks for your input.

For nitrates it's less than 40ppm, preferably less than 20 if possible.
I can't recall from memory what Phosphates were.

I believe between .5 PPM and 1 PPM of Phosphates is recommended. Although
some people say the ratio of Nitrates to Phosphates is also important (about
10 N to 1 P). Since your Nitrates should be below 20, this gives you a P of
2 or less.