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Re: High phosphate from tap

On Sun, 12 Mar 2000, Jeff Bodin wrote:
> I then measured it out of my Tap.... 10 PPM P. I use RO and it is about 1 
> PPM out of the RO (not bad for 90% rejection).
> So, How high is high??? I know a bunch of you are going to say ZERO is 
> ideal, but at what levels do we expect a massive algae breakout.

P can be arbitrarily high if the other controlling conditions in your tank
- like light and available iron levels - are right.  For most purposes I
think 0.1 ppm phosphate (0.03 ppm P) is good, and 0.2 ppm phosphate (0.07
ppm P) might be high.  I don't know how one might generalize a level that
is "too" high.

There is of course a huge variability, depending on your tank conditions.

Roger Miller