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Re: nutrient uptkake response time

When the folks on this list (read Tom Barr) talked me into switching from RO
to tap water the Aponogeton rigidifolius in the tank was off color and had a
slight algae coating.  After a 50% water change with tap water that has, on
average, 0.61 ppm PO4 the plants would pearl within 10 minutes, color would
return shortly thereafter, and signs of algae would dissapear within hours
or by the next morning.  After a couple of days the above problem symptoms
would return until the next water change.

Is response time in any way related the absence of a nutrient (starved
plant) for a prolonged period?

Jay Reeves